| 
                 
                    Closing price on 8/16/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    1.80 | 
                 
                
                    | High | 
                    1.88 | 
                 
                
                    | Low | 
                    1.70 | 
                     
                
                    | Volume | 
                    176,290 | 
                                 
                
                    | Split-adjusted Price | 
                    1.68 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
VOS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/16/2019
             | 
            
                -0.01 / -0.55%
             |             
            
                1.80
             |           
            
                1.88
             |               
            
                1.70
             |                           
            
                1.80
             | 
            
                1.79
             |                     
            
                1.68
             |                                 
            
                176,290
             |            
            
                 
             |                                       
         
    
        
            | 
                8/15/2019
             | 
            
                +0.11 / +6.47%
             |             
            
                1.70
             |           
            
                1.81
             |               
            
                1.66
             |                           
            
                1.81
             | 
            
                1.77
             |                     
            
                1.68
             |                                 
            
                542,860
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/14/2019
             | 
            
                -0.06 / -3.41%
             |             
            
                1.65
             |           
            
                1.74
             |               
            
                1.65
             |                           
            
                1.70
             | 
            
                1.69
             |                     
            
                1.58
             |                                 
            
                133,510
             |            
            
                 
             |                                       
         
    
        
            | 
                8/13/2019
             | 
            
                -0.13 / -6.88%
             |             
            
                1.89
             |           
            
                1.89
             |               
            
                1.76
             |                           
            
                1.76
             | 
            
                1.78
             |                     
            
                1.64
             |                                 
            
                216,940
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/12/2019
             | 
            
                +0.12 / +6.78%
             |             
            
                1.80
             |           
            
                1.89
             |               
            
                1.80
             |                           
            
                1.89
             | 
            
                1.88
             |                     
            
                1.76
             |                                 
            
                771,900
             |            
            
                 
             |                                       
         
    
        
            | 
                8/9/2019
             | 
            
                +0.11 / +6.63%
             |             
            
                1.68
             |           
            
                1.77
             |               
            
                1.66
             |                           
            
                1.77
             | 
            
                1.77
             |                     
            
                1.65
             |                                 
            
                436,710
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/8/2019
             | 
            
                +0.10 / +6.41%
             |             
            
                1.57
             |           
            
                1.66
             |               
            
                1.57
             |                           
            
                1.66
             | 
            
                1.64
             |                     
            
                1.55
             |                                 
            
                614,430
             |            
            
                 
             |                                       
         
    
        
            | 
                8/7/2019
             | 
            
                0.00 / 0.00%
             |             
            
                1.56
             |           
            
                1.56
             |               
            
                1.54
             |                           
            
                1.56
             | 
            
                1.56
             |                     
            
                1.45
             |                                 
            
                340,780
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/6/2019
             | 
            
                0.00 / 0.00%
             |             
            
                1.52
             |           
            
                1.56
             |               
            
                1.52
             |                           
            
                1.56
             | 
            
                1.55
             |                     
            
                1.45
             |                                 
            
                262,440
             |            
            
                 
             |                                       
         
    
        
            | 
                8/5/2019
             | 
            
                +0.04 / +2.63%
             |             
            
                1.51
             |           
            
                1.57
             |               
            
                1.51
             |                           
            
                1.56
             | 
            
                1.55
             |                     
            
                1.45
             |                                 
            
                285,740
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/2/2019
             | 
            
                +0.02 / +1.33%
             |             
            
                1.47
             |           
            
                1.53
             |               
            
                1.47
             |                           
            
                1.52
             | 
            
                1.51
             |                     
            
                1.41
             |                                 
            
                197,910
             |            
            
                 
             |                                       
         
    
        
            | 
                8/1/2019
             | 
            
                +0.03 / +2.04%
             |             
            
                1.49
             |           
            
                1.50
             |               
            
                1.47
             |                           
            
                1.50
             | 
            
                1.50
             |                     
            
                1.40
             |                                 
            
                61,520
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/31/2019
             | 
            
                0.00 / 0.00%
             |             
            
                1.44
             |           
            
                1.49
             |               
            
                1.41
             |                           
            
                1.47
             | 
            
                1.46
             |                     
            
                1.37
             |                                 
            
                116,210
             |            
            
                 
             |                                       
         
    
        
            | 
                7/30/2019
             | 
            
                +0.02 / +1.38%
             |             
            
                1.45
             |           
            
                1.50
             |               
            
                1.43
             |                           
            
                1.47
             | 
            
                1.47
             |                     
            
                1.37
             |                                 
            
                90,870
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/29/2019
             | 
            
                -0.02 / -1.36%
             |             
            
                1.48
             |           
            
                1.48
             |               
            
                1.41
             |                           
            
                1.45
             | 
            
                1.45
             |                     
            
                1.35
             |                                 
            
                67,460
             |            
            
                 
             |                                       
         
    
        
            | 
                7/26/2019
             | 
            
                0.00 / 0.00%
             |             
            
                1.43
             |           
            
                1.48
             |               
            
                1.43
             |                           
            
                1.47
             | 
            
                1.45
             |                     
            
                1.37
             |                                 
            
                35,950
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/25/2019
             | 
            
                0.00 / 0.00%
             |             
            
                1.47
             |           
            
                1.48
             |               
            
                1.43
             |                           
            
                1.47
             | 
            
                1.45
             |                     
            
                1.37
             |                                 
            
                44,160
             |            
            
                 
             |                                       
         
    
        
            | 
                7/24/2019
             | 
            
                +0.01 / +0.68%
             |             
            
                1.46
             |           
            
                1.49
             |               
            
                1.40
             |                           
            
                1.47
             | 
            
                1.45
             |                     
            
                1.37
             |                                 
            
                47,650
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/23/2019
             | 
            
                -0.04 / -2.67%
             |             
            
                1.49
             |           
            
                1.50
             |               
            
                1.46
             |                           
            
                1.46
             | 
            
                1.46
             |                     
            
                1.36
             |                                 
            
                43,010
             |            
            
                 
             |                                       
         
    
        
            | 
                7/22/2019
             | 
            
                0.00 / 0.00%
             |             
            
                1.50
             |           
            
                1.50
             |               
            
                1.48
             |                           
            
                1.50
             | 
            
                1.50
             |                     
            
                1.40
             |                                 
            
                25,320
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/19/2019
             | 
            
                0.00 / 0.00%
             |             
            
                1.50
             |           
            
                1.51
             |               
            
                1.48
             |                           
            
                1.50
             | 
            
                1.50
             |                     
            
                1.40
             |                                 
            
                90,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/18/2019
             | 
            
                -0.02 / -1.32%
             |             
            
                1.52
             |           
            
                1.52
             |               
            
                1.50
             |                           
            
                1.50
             | 
            
                1.50
             |                     
            
                1.40
             |                                 
            
                269,240
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/17/2019
             | 
            
                -0.02 / -1.30%
             |             
            
                1.54
             |           
            
                1.54
             |               
            
                1.50
             |                           
            
                1.52
             | 
            
                1.53
             |                     
            
                1.41
             |                                 
            
                155,380
             |            
            
                 
             |                                       
         
    
        
            | 
                7/16/2019
             | 
            
                +0.06 / +4.05%
             |             
            
                1.46
             |           
            
                1.54
             |               
            
                1.46
             |                           
            
                1.54
             | 
            
                1.51
             |                     
            
                1.43
             |                                 
            
                183,750
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/15/2019
             | 
            
                0.00 / 0.00%
             |             
            
                1.49
             |           
            
                1.49
             |               
            
                1.46
             |                           
            
                1.48
             | 
            
                1.48
             |                     
            
                1.38
             |                                 
            
                20,770
             |            
            
                 
             |                                       
         
    
        
            | 
                7/12/2019
             | 
            
                +0.03 / +2.07%
             |             
            
                1.45
             |           
            
                1.48
             |               
            
                1.45
             |                           
            
                1.48
             | 
            
                1.45
             |                     
            
                1.38
             |                                 
            
                152,010
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/11/2019
             | 
            
                -0.03 / -2.03%
             |             
            
                1.48
             |           
            
                1.49
             |               
            
                1.45
             |                           
            
                1.45
             | 
            
                1.47
             |                     
            
                1.35
             |                                 
            
                59,190
             |            
            
                 
             |                                       
         
    
        
            | 
                7/10/2019
             | 
            
                +0.02 / +1.37%
             |             
            
                1.46
             |           
            
                1.51
             |               
            
                1.44
             |                           
            
                1.48
             | 
            
                1.46
             |                     
            
                1.38
             |                                 
            
                67,010
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/9/2019
             | 
            
                0.00 / 0.00%
             |             
            
                1.43
             |           
            
                1.47
             |               
            
                1.43
             |                           
            
                1.46
             | 
            
                1.45
             |                     
            
                1.36
             |                                 
            
                8,140
             |            
            
                 
             |                                       
         
    
        
            | 
                7/8/2019
             | 
            
                +0.02 / +1.39%
             |             
            
                1.44
             |           
            
                1.47
             |               
            
                1.44
             |                           
            
                1.46
             | 
            
                1.45
             |                     
            
                1.36
             |                                 
            
                35,030
             |  
            
                 
             |                                                              
             
    
         
    
    
 |