| 
                 
                    Closing price on 7/26/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    1.43 | 
                 
                
                    | High | 
                    1.48 | 
                 
                
                    | Low | 
                    1.43 | 
                     
                
                    | Volume | 
                    35,950 | 
                                 
                
                    | Split-adjusted Price | 
                    1.37 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
VOS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |            
            
                 
             |                                       
         
    
        
            | 
                7/5/2019
             | 
            
                -0.01 / -0.69%
             |             
            
                1.47
             |           
            
                1.47
             |               
            
                1.44
             |                           
            
                1.44
             | 
            
                1.45
             |                     
            
                1.34
             |                                 
            
                33,820
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/4/2019
             | 
            
                -0.02 / -1.36%
             |             
            
                1.45
             |           
            
                1.47
             |               
            
                1.45
             |                           
            
                1.45
             | 
            
                1.46
             |                     
            
                1.35
             |                                 
            
                85,670
             |            
            
                 
             |                                       
         
    
        
            | 
                7/3/2019
             | 
            
                -0.01 / -0.68%
             |             
            
                1.47
             |           
            
                1.49
             |               
            
                1.45
             |                           
            
                1.47
             | 
            
                1.46
             |                     
            
                1.37
             |                                 
            
                52,670
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/2/2019
             | 
            
                0.00 / 0.00%
             |             
            
                1.45
             |           
            
                1.50
             |               
            
                1.45
             |                           
            
                1.48
             | 
            
                1.49
             |                     
            
                1.38
             |                                 
            
                20,080
             |            
            
                 
             |                                       
         
    
        
            | 
                7/1/2019
             | 
            
                +0.03 / +2.07%
             |             
            
                1.50
             |           
            
                1.50
             |               
            
                1.45
             |                           
            
                1.48
             | 
            
                1.46
             |                     
            
                1.38
             |                                 
            
                101,470
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/28/2019
             | 
            
                -0.09 / -5.84%
             |             
            
                1.50
             |           
            
                1.51
             |               
            
                1.45
             |                           
            
                1.45
             | 
            
                1.48
             |                     
            
                1.35
             |                                 
            
                115,810
             |            
            
                 
             |                                       
         
    
        
            | 
                6/27/2019
             | 
            
                +0.03 / +1.99%
             |             
            
                1.55
             |           
            
                1.55
             |               
            
                1.50
             |                           
            
                1.54
             | 
            
                1.51
             |                     
            
                1.43
             |                                 
            
                31,170
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/26/2019
             | 
            
                +0.03 / +2.03%
             |             
            
                1.50
             |           
            
                1.57
             |               
            
                1.50
             |                           
            
                1.51
             | 
            
                1.53
             |                     
            
                1.41
             |                                 
            
                89,500
             |            
            
                 
             |                                       
         
    
        
            | 
                6/25/2019
             | 
            
                -0.04 / -2.63%
             |             
            
                1.52
             |           
            
                1.54
             |               
            
                1.42
             |                           
            
                1.48
             | 
            
                1.44
             |                     
            
                1.38
             |                                 
            
                628,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/24/2019
             | 
            
                0.00 / 0.00%
             |             
            
                1.52
             |           
            
                1.55
             |               
            
                1.52
             |                           
            
                1.52
             | 
            
                1.53
             |                     
            
                1.41
             |                                 
            
                29,340
             |            
            
                 
             |                                       
         
    
        
            | 
                6/21/2019
             | 
            
                0.00 / 0.00%
             |             
            
                1.57
             |           
            
                1.57
             |               
            
                1.51
             |                           
            
                1.52
             | 
            
                1.54
             |                     
            
                1.41
             |                                 
            
                34,560
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/20/2019
             | 
            
                -0.02 / -1.30%
             |             
            
                1.58
             |           
            
                1.58
             |               
            
                1.52
             |                           
            
                1.52
             | 
            
                1.55
             |                     
            
                1.41
             |                                 
            
                13,220
             |            
            
                 
             |                                       
         
    
        
            | 
                6/19/2019
             | 
            
                -0.05 / -3.14%
             |             
            
                1.59
             |           
            
                1.59
             |               
            
                1.54
             |                           
            
                1.54
             | 
            
                1.58
             |                     
            
                1.43
             |                                 
            
                26,030
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/18/2019
             | 
            
                +0.01 / +0.63%
             |             
            
                1.50
             |           
            
                1.59
             |               
            
                1.50
             |                           
            
                1.59
             | 
            
                1.52
             |                     
            
                1.48
             |                                 
            
                20,350
             |            
            
                 
             |                                       
         
    
        
            | 
                6/17/2019
             | 
            
                -0.02 / -1.25%
             |             
            
                1.58
             |           
            
                1.60
             |               
            
                1.52
             |                           
            
                1.58
             | 
            
                1.57
             |                     
            
                1.47
             |                                 
            
                18,470
             |  
            
                 
             |                                                              
             
    
         
    
    
 |