| 
                 
                    Closing price on 7/14/2021
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    2.20 | 
                 
                
                    | High | 
                    2.20 | 
                 
                
                    | Low | 
                    2.00 | 
                     
                
                    | Volume | 
                    14,700 | 
                                 
                
                    | Split-adjusted Price | 
                    2.10 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SDP Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                7/14/2021
             | 
            
                -0.10 / -4.55%
             |             
            
                2.20
             |           
            
                2.20
             |               
            
                2.00
             |                           
            
                2.10
             | 
            
                2.10
             |                     
            
                2.10
             |                                 
            
                14,700
             |            
            
                 
             |                                       
         
    
        
            | 
                7/13/2021
             | 
            
                +0.20 / +10.00%
             |             
            
                2.00
             |           
            
                2.20
             |               
            
                2.00
             |                           
            
                2.20
             | 
            
                2.20
             |                     
            
                2.20
             |                                 
            
                37,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/12/2021
             | 
            
                -0.20 / -9.09%
             |             
            
                2.10
             |           
            
                2.10
             |               
            
                1.90
             |                           
            
                2.00
             | 
            
                2.00
             |                     
            
                2.00
             |                                 
            
                79,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/9/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.20
             |           
            
                2.30
             |               
            
                2.10
             |                           
            
                2.30
             | 
            
                2.20
             |                     
            
                2.30
             |                                 
            
                59,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/8/2021
             | 
            
                +0.10 / +4.76%
             |             
            
                2.10
             |           
            
                2.30
             |               
            
                2.10
             |                           
            
                2.20
             | 
            
                2.26
             |                     
            
                2.20
             |                                 
            
                33,200
             |            
            
                 
             |                                       
         
    
        
            | 
                7/7/2021
             | 
            
                -0.20 / -8.70%
             |             
            
                2.10
             |           
            
                2.30
             |               
            
                2.00
             |                           
            
                2.10
             | 
            
                2.10
             |                     
            
                2.10
             |                                 
            
                152,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/6/2021
             | 
            
                -0.10 / -4.35%
             |             
            
                2.30
             |           
            
                2.30
             |               
            
                2.20
             |                           
            
                2.20
             | 
            
                2.30
             |                     
            
                2.20
             |                                 
            
                45,200
             |            
            
                 
             |                                       
         
    
        
            | 
                7/5/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.40
             |           
            
                2.40
             |               
            
                2.20
             |                           
            
                2.30
             | 
            
                2.30
             |                     
            
                2.30
             |                                 
            
                129,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/2/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.40
             |           
            
                2.40
             |               
            
                2.30
             |                           
            
                2.30
             | 
            
                2.30
             |                     
            
                2.30
             |                                 
            
                44,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/1/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.40
             |           
            
                2.40
             |               
            
                2.30
             |                           
            
                2.40
             | 
            
                2.30
             |                     
            
                2.40
             |                                 
            
                46,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/30/2021
             | 
            
                +0.10 / +4.35%
             |             
            
                2.30
             |           
            
                2.50
             |               
            
                2.30
             |                           
            
                2.40
             | 
            
                2.40
             |                     
            
                2.40
             |                                 
            
                132,400
             |            
            
                 
             |                                       
         
    
        
            | 
                6/29/2021
             | 
            
                -0.10 / -4.17%
             |             
            
                2.30
             |           
            
                2.40
             |               
            
                2.30
             |                           
            
                2.30
             | 
            
                2.30
             |                     
            
                2.30
             |                                 
            
                31,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/28/2021
             | 
            
                +0.10 / +4.35%
             |             
            
                2.40
             |           
            
                2.50
             |               
            
                2.30
             |                           
            
                2.40
             | 
            
                2.40
             |                     
            
                2.40
             |                                 
            
                73,200
             |            
            
                 
             |                                       
         
    
        
            | 
                6/25/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.50
             |           
            
                2.50
             |               
            
                2.30
             |                           
            
                2.40
             | 
            
                2.30
             |                     
            
                2.40
             |                                 
            
                183,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/24/2021
             | 
            
                -0.10 / -4.00%
             |             
            
                2.40
             |           
            
                2.50
             |               
            
                2.30
             |                           
            
                2.40
             | 
            
                2.40
             |                     
            
                2.40
             |                                 
            
                71,100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/23/2021
             | 
            
                -0.10 / -4.00%
             |             
            
                2.50
             |           
            
                2.60
             |               
            
                2.40
             |                           
            
                2.40
             | 
            
                2.50
             |                     
            
                2.40
             |                                 
            
                77,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/22/2021
             | 
            
                +0.20 / +8.33%
             |             
            
                2.40
             |           
            
                2.60
             |               
            
                2.40
             |                           
            
                2.60
             | 
            
                2.50
             |                     
            
                2.60
             |                                 
            
                468,900
             |            
            
                 
             |                                       
         
    
        
            | 
                6/21/2021
             | 
            
                +0.10 / +4.35%
             |             
            
                2.40
             |           
            
                2.40
             |               
            
                2.30
             |                           
            
                2.40
             | 
            
                2.40
             |                     
            
                2.40
             |                                 
            
                46,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/18/2021
             | 
            
                +0.10 / +4.35%
             |             
            
                2.40
             |           
            
                2.40
             |               
            
                2.30
             |                           
            
                2.40
             | 
            
                2.30
             |                     
            
                2.40
             |                                 
            
                59,800
             |            
            
                 
             |                                       
         
    
        
            | 
                6/17/2021
             | 
            
                +0.10 / +4.35%
             |             
            
                2.40
             |           
            
                2.40
             |               
            
                2.30
             |                           
            
                2.40
             | 
            
                2.30
             |                     
            
                2.40
             |                                 
            
                52,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/16/2021
             | 
            
                +0.10 / +4.35%
             |             
            
                2.40
             |           
            
                2.40
             |               
            
                2.30
             |                           
            
                2.40
             | 
            
                2.30
             |                     
            
                2.40
             |                                 
            
                23,700
             |            
            
                 
             |                                       
         
    
        
            | 
                6/15/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.30
             |           
            
                2.40
             |               
            
                2.30
             |                           
            
                2.40
             | 
            
                2.30
             |                     
            
                2.40
             |                                 
            
                130,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/14/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.30
             |           
            
                2.40
             |               
            
                2.30
             |                           
            
                2.40
             | 
            
                2.40
             |                     
            
                2.40
             |                                 
            
                52,700
             |            
            
                 
             |                                       
         
    
        
            | 
                6/11/2021
             | 
            
                +0.10 / +4.17%
             |             
            
                2.40
             |           
            
                2.50
             |               
            
                2.30
             |                           
            
                2.50
             | 
            
                2.40
             |                     
            
                2.50
             |                                 
            
                102,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/10/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.50
             |           
            
                2.50
             |               
            
                2.30
             |                           
            
                2.40
             | 
            
                2.40
             |                     
            
                2.40
             |                                 
            
                136,200
             |            
            
                 
             |                                       
         
    
        
            | 
                6/9/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.50
             |           
            
                2.50
             |               
            
                2.30
             |                           
            
                2.50
             | 
            
                2.40
             |                     
            
                2.50
             |                                 
            
                127,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/8/2021
             | 
            
                +0.10 / +4.17%
             |             
            
                2.50
             |           
            
                2.60
             |               
            
                2.40
             |                           
            
                2.50
             | 
            
                2.50
             |                     
            
                2.50
             |                                 
            
                237,600
             |            
            
                 
             |                                       
         
    
        
            | 
                6/7/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.50
             |           
            
                2.50
             |               
            
                2.40
             |                           
            
                2.50
             | 
            
                2.41
             |                     
            
                2.50
             |                                 
            
                143,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/4/2021
             | 
            
                -0.10 / -3.85%
             |             
            
                2.70
             |           
            
                2.80
             |               
            
                2.30
             |                           
            
                2.50
             | 
            
                2.50
             |                     
            
                2.50
             |                                 
            
                381,300
             |            
            
                 
             |                                       
         
    
        
            | 
                6/3/2021
             | 
            
                +0.30 / +12.50%
             |             
            
                2.50
             |           
            
                2.70
             |               
            
                2.40
             |                           
            
                2.70
             | 
            
                2.60
             |                     
            
                2.70
             |                                 
            
                265,000
             |  
            
                 
             |                                                              
             
    
         
    
    
 |