1,             
           
          

              
    
  2,        
   B        
           
 
3,            B 
           
         
           
    
 4,     
A.B.C            
           
           
       
  5,  
           
             
  

6,      
           
 7,
             
         B1  
     
 8,        
           
A  C           
               
   C            
        
 9,    
             
       
10,   
             
       