| 
                 
                    Closing price on 5/16/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    11.40 | 
                 
                
                    | High | 
                    11.40 | 
                 
                
                    | Low | 
                    10.00 | 
                     
                
                    | Volume | 
                    65,400 | 
                                 
                
                    | Split-adjusted Price | 
                    7.90 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
DAS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/16/2019
             | 
            
                +0.20 / +2.00%
             |             
            
                11.40
             |           
            
                11.40
             |               
            
                10.00
             |                           
            
                10.20
             | 
            
                10.12
             |                     
            
                7.90
             |                                 
            
                65,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/15/2019
             | 
            
                +1.70 / +20.48%
             |             
            
                9.90
             |           
            
                10.00
             |               
            
                9.90
             |                           
            
                10.00
             | 
            
                9.99
             |                     
            
                7.74
             |                                 
            
                3,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/14/2019
             | 
            
                +0.20 / +2.47%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                8.30
             |                           
            
                8.30
             | 
            
                8.67
             |                     
            
                6.43
             |                                 
            
                6,900
             |            
            
                 
             |                                       
         
    
        
            | 
                5/13/2019
             | 
            
                +1.00 / +14.08%
             |             
            
                8.10
             |           
            
                8.10
             |               
            
                8.10
             |                           
            
                8.10
             | 
            
                8.10
             |                     
            
                6.27
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/10/2019
             | 
            
                +1.00 / +16.13%
             |             
            
                5.40
             |           
            
                7.20
             |               
            
                5.40
             |                           
            
                7.20
             | 
            
                7.10
             |                     
            
                5.57
             |                                 
            
                3,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/9/2019
             | 
            
                -1.00 / -13.89%
             |             
            
                6.50
             |           
            
                6.50
             |               
            
                6.20
             |                           
            
                6.20
             | 
            
                6.32
             |                     
            
                4.80
             |                                 
            
                500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/8/2019
             | 
            
                -1.20 / -14.29%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                7.20
             |                           
            
                7.20
             | 
            
                7.20
             |                     
            
                5.57
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/7/2019
             | 
            
                -1.50 / -15.15%
             |             
            
                8.60
             |           
            
                8.60
             |               
            
                8.40
             |                           
            
                8.40
             | 
            
                8.40
             |                     
            
                6.50
             |                                 
            
                5,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/6/2019
             | 
            
                +0.10 / +1.02%
             |             
            
                8.60
             |           
            
                9.90
             |               
            
                8.40
             |                           
            
                9.90
             | 
            
                9.78
             |                     
            
                7.66
             |                                 
            
                19,900
             |            
            
                 
             |                                       
         
    
        
            | 
                5/3/2019
             | 
            
                -0.80 / -7.55%
             |             
            
                9.80
             |           
            
                9.80
             |               
            
                9.80
             |                           
            
                9.80
             | 
            
                9.80
             |                     
            
                7.59
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/2/2019
             | 
            
                -1.80 / -14.52%
             |             
            
                10.60
             |           
            
                10.60
             |               
            
                10.60
             |                           
            
                10.60
             | 
            
                10.60
             |                     
            
                8.21
             |                                 
            
                15,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/26/2019
             | 
            
                -2.10 / -14.48%
             |             
            
                12.40
             |           
            
                12.40
             |               
            
                12.40
             |                           
            
                12.40
             | 
            
                12.40
             |                     
            
                9.60
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/25/2019
             | 
            
                -0.50 / -3.33%
             |             
            
                14.50
             |           
            
                14.50
             |               
            
                14.50
             |                           
            
                14.50
             | 
            
                14.50
             |                     
            
                11.23
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/24/2019
             | 
            
                +1.10 / +7.91%
             |             
            
                15.60
             |           
            
                16.00
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.37
             |                     
            
                11.61
             |                                 
            
                4,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/23/2019
             | 
            
                +1.20 / +9.45%
             |             
            
                13.90
             |           
            
                14.10
             |               
            
                13.90
             |                           
            
                13.90
             | 
            
                13.97
             |                     
            
                10.76
             |                                 
            
                300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/22/2019
             | 
            
                +1.50 / +13.39%
             |             
            
                12.80
             |           
            
                12.80
             |               
            
                9.70
             |                           
            
                12.70
             | 
            
                12.34
             |                     
            
                9.83
             |                                 
            
                1,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/19/2019
             | 
            
                +0.30 / +3.00%
             |             
            
                10.00
             |           
            
                11.50
             |               
            
                10.00
             |                           
            
                10.30
             | 
            
                11.21
             |                     
            
                7.97
             |                                 
            
                5,800
             |            
            
                 
             |                                       
         
    
        
            | 
                4/18/2019
             | 
            
                +1.30 / +14.94%
             |             
            
                10.00
             |           
            
                10.00
             |               
            
                10.00
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                7.74
             |                                 
            
                500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/17/2019
             | 
            
                0.00 / 0.00%
             |             
            
                8.70
             |           
            
                8.70
             |               
            
                8.70
             |                           
            
                8.70
             | 
            
                8.70
             |                     
            
                6.74
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/16/2019
             | 
            
                0.00 / 0.00%
             |             
            
                8.70
             |           
            
                8.70
             |               
            
                8.70
             |                           
            
                8.70
             | 
            
                8.70
             |                     
            
                6.74
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/12/2019
             | 
            
                -1.10 / -12.22%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                7.90
             |                           
            
                7.90
             | 
            
                8.69
             |                     
            
                6.12
             |                                 
            
                700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/11/2019
             | 
            
                +0.20 / +2.27%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                9.00
             |                           
            
                9.00
             | 
            
                9.00
             |                     
            
                6.97
             |                                 
            
                500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/10/2019
             | 
            
                +1.10 / +14.29%
             |             
            
                8.80
             |           
            
                8.80
             |               
            
                8.80
             |                           
            
                8.80
             | 
            
                8.80
             |                     
            
                6.81
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/9/2019
             | 
            
                -1.30 / -14.44%
             |             
            
                7.70
             |           
            
                7.70
             |               
            
                7.70
             |                           
            
                7.70
             | 
            
                7.70
             |                     
            
                5.96
             |                                 
            
                500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/8/2019
             | 
            
                0.00 / 0.00%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                9.00
             |                           
            
                9.00
             | 
            
                9.00
             |                     
            
                6.97
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2019
             | 
            
                0.00 / 0.00%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                9.00
             |                           
            
                9.00
             | 
            
                9.00
             |                     
            
                6.97
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2019
             | 
            
                0.00 / 0.00%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                9.00
             |                           
            
                9.00
             | 
            
                9.00
             |                     
            
                6.97
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2019
             | 
            
                0.00 / 0.00%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                9.00
             |                           
            
                9.00
             | 
            
                9.00
             |                     
            
                6.97
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/2/2019
             | 
            
                0.00 / 0.00%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                9.00
             |                           
            
                9.00
             | 
            
                9.00
             |                     
            
                6.97
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/1/2019
             | 
            
                0.00 / 0.00%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                9.00
             |                           
            
                9.00
             | 
            
                9.00
             |                     
            
                6.97
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
         
    
    
 |