| 
                 
                    Closing price on 9/16/2020
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    4.50 | 
                 
                
                    | High | 
                    4.70 | 
                 
                
                    | Low | 
                    4.50 | 
                     
                
                    | Volume | 
                    99,260 | 
                                 
                
                    | Split-adjusted Price | 
                    3.57 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
YBM Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                9/16/2020
             | 
            
                +0.30 / +6.82%
             |             
            
                4.50
             |           
            
                4.70
             |               
            
                4.50
             |                           
            
                4.70
             | 
            
                4.66
             |                     
            
                3.57
             |                                 
            
                99,260
             |            
            
                 
             |                                       
         
    
        
            | 
                9/15/2020
             | 
            
                +0.17 / +4.02%
             |             
            
                4.21
             |           
            
                4.40
             |               
            
                4.21
             |                           
            
                4.40
             | 
            
                4.33
             |                     
            
                3.35
             |                                 
            
                46,680
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/14/2020
             | 
            
                0.00 / 0.00%
             |             
            
                4.23
             |           
            
                4.24
             |               
            
                4.21
             |                           
            
                4.23
             | 
            
                4.23
             |                     
            
                3.22
             |                                 
            
                11,340
             |            
            
                 
             |                                       
         
    
        
            | 
                9/11/2020
             | 
            
                +0.14 / +3.42%
             |             
            
                4.13
             |           
            
                4.34
             |               
            
                4.13
             |                           
            
                4.23
             | 
            
                4.24
             |                     
            
                3.22
             |                                 
            
                64,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/10/2020
             | 
            
                -0.04 / -0.97%
             |             
            
                4.15
             |           
            
                4.15
             |               
            
                4.07
             |                           
            
                4.09
             | 
            
                4.12
             |                     
            
                3.11
             |                                 
            
                3,130
             |            
            
                 
             |                                       
         
    
        
            | 
                9/9/2020
             | 
            
                +0.03 / +0.73%
             |             
            
                4.15
             |           
            
                4.15
             |               
            
                4.07
             |                           
            
                4.13
             | 
            
                4.11
             |                     
            
                3.14
             |                                 
            
                5,590
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/8/2020
             | 
            
                +0.03 / +0.74%
             |             
            
                4.05
             |           
            
                4.11
             |               
            
                4.05
             |                           
            
                4.10
             | 
            
                4.08
             |                     
            
                3.12
             |                                 
            
                5,640
             |            
            
                 
             |                                       
         
    
        
            | 
                9/7/2020
             | 
            
                -0.03 / -0.73%
             |             
            
                4.14
             |           
            
                4.19
             |               
            
                4.07
             |                           
            
                4.07
             | 
            
                4.11
             |                     
            
                3.10
             |                                 
            
                14,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/4/2020
             | 
            
                -0.14 / -3.30%
             |             
            
                4.02
             |           
            
                4.19
             |               
            
                4.02
             |                           
            
                4.10
             | 
            
                4.13
             |                     
            
                3.12
             |                                 
            
                7,030
             |            
            
                 
             |                                       
         
    
        
            | 
                9/3/2020
             | 
            
                +0.12 / +2.91%
             |             
            
                4.19
             |           
            
                4.40
             |               
            
                4.15
             |                           
            
                4.24
             | 
            
                4.19
             |                     
            
                3.22
             |                                 
            
                21,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/1/2020
             | 
            
                -0.07 / -1.67%
             |             
            
                4.12
             |           
            
                4.18
             |               
            
                4.04
             |                           
            
                4.12
             | 
            
                4.08
             |                     
            
                3.13
             |                                 
            
                20,610
             |            
            
                 
             |                                       
         
    
        
            | 
                8/31/2020
             | 
            
                0.00 / 0.00%
             |             
            
                4.19
             |           
            
                4.19
             |               
            
                4.13
             |                           
            
                4.19
             | 
            
                4.18
             |                     
            
                3.19
             |                                 
            
                11,210
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/28/2020
             | 
            
                +0.04 / +0.96%
             |             
            
                4.24
             |           
            
                4.28
             |               
            
                4.08
             |                           
            
                4.19
             | 
            
                4.22
             |                     
            
                3.19
             |                                 
            
                15,160
             |            
            
                 
             |                                       
         
    
        
            | 
                8/27/2020
             | 
            
                -0.12 / -2.81%
             |             
            
                4.17
             |           
            
                4.25
             |               
            
                4.12
             |                           
            
                4.15
             | 
            
                4.14
             |                     
            
                3.16
             |                                 
            
                32,390
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/26/2020
             | 
            
                +0.14 / +3.39%
             |             
            
                4.01
             |           
            
                4.28
             |               
            
                4.01
             |                           
            
                4.27
             | 
            
                4.23
             |                     
            
                3.25
             |                                 
            
                7,560
             |            
            
                 
             |                                       
         
    
        
            | 
                8/25/2020
             | 
            
                -0.01 / -0.24%
             |             
            
                4.27
             |           
            
                4.27
             |               
            
                4.12
             |                           
            
                4.13
             | 
            
                4.14
             |                     
            
                3.14
             |                                 
            
                18,120
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/24/2020
             | 
            
                +0.03 / +0.73%
             |             
            
                4.26
             |           
            
                4.26
             |               
            
                4.13
             |                           
            
                4.14
             | 
            
                4.14
             |                     
            
                3.15
             |                                 
            
                57,470
             |            
            
                 
             |                                       
         
    
        
            | 
                8/21/2020
             | 
            
                -0.16 / -3.75%
             |             
            
                4.27
             |           
            
                4.27
             |               
            
                4.02
             |                           
            
                4.11
             | 
            
                4.07
             |                     
            
                3.13
             |                                 
            
                11,050
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/20/2020
             | 
            
                +0.20 / +4.91%
             |             
            
                4.02
             |           
            
                4.30
             |               
            
                4.02
             |                           
            
                4.27
             | 
            
                4.28
             |                     
            
                3.25
             |                                 
            
                5,380
             |            
            
                 
             |                                       
         
    
        
            | 
                8/19/2020
             | 
            
                -0.23 / -5.35%
             |             
            
                4.30
             |           
            
                4.30
             |               
            
                4.06
             |                           
            
                4.07
             | 
            
                4.08
             |                     
            
                3.10
             |                                 
            
                29,140
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/18/2020
             | 
            
                -0.11 / -2.49%
             |             
            
                4.49
             |           
            
                4.49
             |               
            
                4.11
             |                           
            
                4.30
             | 
            
                4.17
             |                     
            
                3.27
             |                                 
            
                29,250
             |            
            
                 
             |                                       
         
    
        
            | 
                8/17/2020
             | 
            
                -0.33 / -6.96%
             |             
            
                4.76
             |           
            
                4.76
             |               
            
                4.41
             |                           
            
                4.41
             | 
            
                4.43
             |                     
            
                3.35
             |                                 
            
                17,150
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/14/2020
             | 
            
                +0.10 / +2.16%
             |             
            
                4.95
             |           
            
                4.95
             |               
            
                4.36
             |                           
            
                4.74
             | 
            
                4.82
             |                     
            
                3.61
             |                                 
            
                45,190
             |            
            
                 
             |                                       
         
    
        
            | 
                8/13/2020
             | 
            
                +0.30 / +6.91%
             |             
            
                4.64
             |           
            
                4.64
             |               
            
                4.64
             |                           
            
                4.64
             | 
            
                4.64
             |                     
            
                3.53
             |                                 
            
                66,480
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/12/2020
             | 
            
                +0.28 / +6.90%
             |             
            
                4.34
             |           
            
                4.34
             |               
            
                4.06
             |                           
            
                4.34
             | 
            
                4.25
             |                     
            
                3.30
             |                                 
            
                34,550
             |            
            
                 
             |                                       
         
    
        
            | 
                8/11/2020
             | 
            
                +0.26 / +6.84%
             |             
            
                3.86
             |           
            
                4.06
             |               
            
                3.86
             |                           
            
                4.06
             | 
            
                4.03
             |                     
            
                3.09
             |                                 
            
                28,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/10/2020
             | 
            
                0.00 / 0.00%
             |             
            
                3.84
             |           
            
                3.88
             |               
            
                3.78
             |                           
            
                3.80
             | 
            
                3.85
             |                     
            
                2.89
             |                                 
            
                4,420
             |            
            
                 
             |                                       
         
    
        
            | 
                8/7/2020
             | 
            
                -0.04 / -1.04%
             |             
            
                3.83
             |           
            
                3.84
             |               
            
                3.80
             |                           
            
                3.80
             | 
            
                3.82
             |                     
            
                2.89
             |                                 
            
                6,130
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/6/2020
             | 
            
                +0.04 / +1.05%
             |             
            
                3.80
             |           
            
                3.84
             |               
            
                3.75
             |                           
            
                3.84
             | 
            
                3.78
             |                     
            
                2.92
             |                                 
            
                7,400
             |            
            
                 
             |                                       
         
    
        
            | 
                8/5/2020
             | 
            
                -0.10 / -2.56%
             |             
            
                3.81
             |           
            
                3.89
             |               
            
                3.80
             |                           
            
                3.80
             | 
            
                3.83
             |                     
            
                2.89
             |                                 
            
                2,960
             |  
            
                 
             |                                                              
             
    
         
    
    
 |