| 
                 
                    Closing price on 7/9/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    1.43 | 
                 
                
                    | High | 
                    1.47 | 
                 
                
                    | Low | 
                    1.43 | 
                     
                
                    | Volume | 
                    8,140 | 
                                 
                
                    | Split-adjusted Price | 
                    1.36 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
VOS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |            
            
                 
             |                                       
         
    
        
            | 
                6/14/2019
             | 
            
                0.00 / 0.00%
             |             
            
                1.58
             |           
            
                1.60
             |               
            
                1.57
             |                           
            
                1.60
             | 
            
                1.59
             |                     
            
                1.49
             |                                 
            
                3,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/13/2019
             | 
            
                +0.08 / +5.26%
             |             
            
                1.52
             |           
            
                1.60
             |               
            
                1.52
             |                           
            
                1.60
             | 
            
                1.56
             |                     
            
                1.49
             |                                 
            
                80,850
             |            
            
                 
             |                                       
         
    
        
            | 
                6/12/2019
             | 
            
                -0.04 / -2.56%
             |             
            
                1.51
             |           
            
                1.55
             |               
            
                1.51
             |                           
            
                1.52
             | 
            
                1.52
             |                     
            
                1.41
             |                                 
            
                32,270
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/11/2019
             | 
            
                0.00 / 0.00%
             |             
            
                1.57
             |           
            
                1.57
             |               
            
                1.50
             |                           
            
                1.56
             | 
            
                1.53
             |                     
            
                1.45
             |                                 
            
                89,620
             |            
            
                 
             |                                       
         
    
        
            | 
                6/10/2019
             | 
            
                0.00 / 0.00%
             |             
            
                1.53
             |           
            
                1.56
             |               
            
                1.53
             |                           
            
                1.56
             | 
            
                1.55
             |                     
            
                1.45
             |                                 
            
                26,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/7/2019
             | 
            
                +0.01 / +0.65%
             |             
            
                1.55
             |           
            
                1.58
             |               
            
                1.55
             |                           
            
                1.56
             | 
            
                1.55
             |                     
            
                1.45
             |                                 
            
                33,530
             |            
            
                 
             |                                       
         
    
        
            | 
                6/6/2019
             | 
            
                -0.05 / -3.13%
             |             
            
                1.60
             |           
            
                1.60
             |               
            
                1.55
             |                           
            
                1.55
             | 
            
                1.57
             |                     
            
                1.44
             |                                 
            
                65,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/5/2019
             | 
            
                -0.01 / -0.62%
             |             
            
                1.61
             |           
            
                1.63
             |               
            
                1.55
             |                           
            
                1.60
             | 
            
                1.56
             |                     
            
                1.49
             |                                 
            
                19,870
             |            
            
                 
             |                                       
         
    
        
            | 
                6/4/2019
             | 
            
                0.00 / 0.00%
             |             
            
                1.53
             |           
            
                1.61
             |               
            
                1.53
             |                           
            
                1.61
             | 
            
                1.60
             |                     
            
                1.50
             |                                 
            
                20,590
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/3/2019
             | 
            
                -0.02 / -1.23%
             |             
            
                1.60
             |           
            
                1.63
             |               
            
                1.59
             |                           
            
                1.61
             | 
            
                1.61
             |                     
            
                1.50
             |                                 
            
                6,360
             |            
            
                 
             |                                       
         
    
        
            | 
                5/31/2019
             | 
            
                +0.01 / +0.62%
             |             
            
                1.65
             |           
            
                1.65
             |               
            
                1.58
             |                           
            
                1.63
             | 
            
                1.63
             |                     
            
                1.52
             |                                 
            
                8,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/30/2019
             | 
            
                0.00 / 0.00%
             |             
            
                1.63
             |           
            
                1.63
             |               
            
                1.60
             |                           
            
                1.62
             | 
            
                1.61
             |                     
            
                1.51
             |                                 
            
                100,160
             |            
            
                 
             |                                       
         
    
        
            | 
                5/29/2019
             | 
            
                -0.02 / -1.22%
             |             
            
                1.64
             |           
            
                1.65
             |               
            
                1.62
             |                           
            
                1.62
             | 
            
                1.64
             |                     
            
                1.51
             |                                 
            
                108,350
             |  
            
                 
             |                                                              
             
    
         
    
    
 |