| 
                 
                    Closing price on 6/23/2020
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    4.60 | 
                 
                
                    | High | 
                    4.91 | 
                 
                
                    | Low | 
                    4.60 | 
                     
                
                    | Volume | 
                    18,220 | 
                                 
                
                    | Split-adjusted Price | 
                    3.73 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
YBM Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/23/2020
             | 
            
                +0.31 / +6.75%
             |             
            
                4.60
             |           
            
                4.91
             |               
            
                4.60
             |                           
            
                4.90
             | 
            
                4.88
             |                     
            
                3.73
             |                                 
            
                18,220
             |            
            
                 
             |                                       
         
    
        
            | 
                6/22/2020
             | 
            
                +0.12 / +2.68%
             |             
            
                4.47
             |           
            
                4.59
             |               
            
                4.39
             |                           
            
                4.59
             | 
            
                4.41
             |                     
            
                3.49
             |                                 
            
                6,810
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/19/2020
             | 
            
                -0.03 / -0.67%
             |             
            
                4.31
             |           
            
                4.60
             |               
            
                4.31
             |                           
            
                4.47
             | 
            
                4.46
             |                     
            
                3.40
             |                                 
            
                7,630
             |            
            
                 
             |                                       
         
    
        
            | 
                6/18/2020
             | 
            
                -0.24 / -5.06%
             |             
            
                4.74
             |           
            
                4.74
             |               
            
                4.45
             |                           
            
                4.50
             | 
            
                4.61
             |                     
            
                3.42
             |                                 
            
                2,750
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/17/2020
             | 
            
                +0.03 / +0.64%
             |             
            
                4.79
             |           
            
                4.79
             |               
            
                4.50
             |                           
            
                4.74
             | 
            
                4.70
             |                     
            
                3.61
             |                                 
            
                3,830
             |            
            
                 
             |                                       
         
    
        
            | 
                6/16/2020
             | 
            
                +0.01 / +0.21%
             |             
            
                4.39
             |           
            
                4.71
             |               
            
                4.38
             |                           
            
                4.71
             | 
            
                4.69
             |                     
            
                3.58
             |                                 
            
                3,410
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/15/2020
             | 
            
                0.00 / 0.00%
             |             
            
                4.70
             |           
            
                4.80
             |               
            
                4.38
             |                           
            
                4.70
             | 
            
                4.58
             |                     
            
                3.57
             |                                 
            
                14,180
             |            
            
                 
             |                                       
         
    
        
            | 
                6/12/2020
             | 
            
                -0.06 / -1.26%
             |             
            
                4.76
             |           
            
                4.76
             |               
            
                4.43
             |                           
            
                4.70
             | 
            
                4.58
             |                     
            
                3.57
             |                                 
            
                13,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/11/2020
             | 
            
                -0.01 / -0.21%
             |             
            
                4.90
             |           
            
                4.95
             |               
            
                4.76
             |                           
            
                4.76
             | 
            
                4.85
             |                     
            
                3.62
             |                                 
            
                59,020
             |            
            
                 
             |                                       
         
    
        
            | 
                6/10/2020
             | 
            
                -0.23 / -4.60%
             |             
            
                5.00
             |           
            
                5.00
             |               
            
                4.76
             |                           
            
                4.77
             | 
            
                4.82
             |                     
            
                3.63
             |                                 
            
                28,240
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/9/2020
             | 
            
                -0.02 / -0.40%
             |             
            
                5.10
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                5.00
             | 
            
                5.01
             |                     
            
                3.80
             |                                 
            
                53,930
             |            
            
                 
             |                                       
         
    
        
            | 
                6/8/2020
             | 
            
                -0.12 / -2.33%
             |             
            
                5.11
             |           
            
                5.11
             |               
            
                4.80
             |                           
            
                5.02
             | 
            
                4.91
             |                     
            
                3.82
             |                                 
            
                23,640
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/5/2020
             | 
            
                -0.16 / -3.02%
             |             
            
                5.06
             |           
            
                5.30
             |               
            
                4.93
             |                           
            
                5.14
             | 
            
                5.06
             |                     
            
                3.91
             |                                 
            
                18,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/4/2020
             | 
            
                +0.30 / +6.00%
             |             
            
                4.75
             |           
            
                5.35
             |               
            
                4.75
             |                           
            
                5.30
             | 
            
                5.05
             |                     
            
                4.03
             |                                 
            
                29,520
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/3/2020
             | 
            
                -0.35 / -6.54%
             |             
            
                5.35
             |           
            
                5.35
             |               
            
                4.98
             |                           
            
                5.00
             | 
            
                5.01
             |                     
            
                3.80
             |                                 
            
                64,490
             |            
            
                 
             |                                       
         
    
        
            | 
                6/2/2020
             | 
            
                +0.34 / +6.79%
             |             
            
                5.36
             |           
            
                5.36
             |               
            
                5.01
             |                           
            
                5.35
             | 
            
                5.22
             |                     
            
                4.07
             |                                 
            
                107,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/1/2020
             | 
            
                +0.32 / +6.82%
             |             
            
                5.01
             |           
            
                5.01
             |               
            
                5.01
             |                           
            
                5.01
             | 
            
                5.01
             |                     
            
                3.81
             |                                 
            
                12,070
             |            
            
                 
             |                                       
         
    
        
            | 
                5/29/2020
             | 
            
                +0.30 / +6.83%
             |             
            
                4.69
             |           
            
                4.69
             |               
            
                4.69
             |                           
            
                4.69
             | 
            
                4.69
             |                     
            
                3.57
             |                                 
            
                28,480
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/28/2020
             | 
            
                +0.28 / +6.81%
             |             
            
                4.39
             |           
            
                4.39
             |               
            
                4.31
             |                           
            
                4.39
             | 
            
                4.38
             |                     
            
                3.34
             |                                 
            
                31,290
             |            
            
                 
             |                                       
         
    
        
            | 
                5/27/2020
             | 
            
                +0.26 / +6.75%
             |             
            
                4.00
             |           
            
                4.11
             |               
            
                4.00
             |                           
            
                4.11
             | 
            
                4.06
             |                     
            
                3.13
             |                                 
            
                56,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/26/2020
             | 
            
                +0.14 / +3.77%
             |             
            
                3.71
             |           
            
                3.88
             |               
            
                3.69
             |                           
            
                3.85
             | 
            
                3.81
             |                     
            
                2.93
             |                                 
            
                3,410
             |            
            
                 
             |                                       
         
    
        
            | 
                5/25/2020
             | 
            
                +0.21 / +6.00%
             |             
            
                3.73
             |           
            
                3.73
             |               
            
                3.51
             |                           
            
                3.71
             | 
            
                3.70
             |                     
            
                2.82
             |                                 
            
                24,330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/22/2020
             | 
            
                +0.09 / +2.64%
             |             
            
                3.41
             |           
            
                3.50
             |               
            
                3.41
             |                           
            
                3.50
             | 
            
                3.41
             |                     
            
                2.66
             |                                 
            
                28,420
             |            
            
                 
             |                                       
         
    
        
            | 
                5/21/2020
             | 
            
                -0.07 / -2.01%
             |             
            
                3.48
             |           
            
                3.49
             |               
            
                3.41
             |                           
            
                3.41
             | 
            
                3.45
             |                     
            
                2.59
             |                                 
            
                7,060
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/20/2020
             | 
            
                +0.02 / +0.58%
             |             
            
                3.47
             |           
            
                3.48
             |               
            
                3.44
             |                           
            
                3.48
             | 
            
                3.47
             |                     
            
                2.65
             |                                 
            
                5,050
             |            
            
                 
             |                                       
         
    
        
            | 
                5/19/2020
             | 
            
                +0.04 / +1.17%
             |             
            
                3.42
             |           
            
                3.47
             |               
            
                3.42
             |                           
            
                3.46
             | 
            
                3.46
             |                     
            
                2.63
             |                                 
            
                5,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/18/2020
             | 
            
                -0.04 / -1.16%
             |             
            
                3.45
             |           
            
                3.46
             |               
            
                3.41
             |                           
            
                3.42
             | 
            
                3.44
             |                     
            
                2.60
             |                                 
            
                13,950
             |            
            
                 
             |                                       
         
    
        
            | 
                5/15/2020
             | 
            
                -0.02 / -0.57%
             |             
            
                3.49
             |           
            
                3.49
             |               
            
                3.41
             |                           
            
                3.46
             | 
            
                3.46
             |                     
            
                2.63
             |                                 
            
                1,620
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/14/2020
             | 
            
                -0.02 / -0.57%
             |             
            
                3.45
             |           
            
                3.49
             |               
            
                3.39
             |                           
            
                3.48
             | 
            
                3.45
             |                     
            
                2.65
             |                                 
            
                9,480
             |            
            
                 
             |                                       
         
    
        
            | 
                5/13/2020
             | 
            
                +0.06 / +1.74%
             |             
            
                3.44
             |           
            
                3.50
             |               
            
                3.37
             |                           
            
                3.50
             | 
            
                3.43
             |                     
            
                2.66
             |                                 
            
                16,600
             |  
            
                 
             |                                                              
             
    
         
    
    
 |