     (  )  
                       
17        
              
                         
18          
                                                  
19          
              
                              
20          
                           
21             
                                  
22         
                 
23                 
                       
24           
                            
25       
             
          
26            
            
27        
              
              
28      
         
                                                      
29       
                             
30            
             
31            
                          
32        
           
                   