                 
                                                                                  3.8  17.6%               

           
1.                                  
2.           
3.                           

            
                        

               
1.     
            10                3  5         10                  
2.   
              1   2           20               
3.     
                                                    
4.    
                      2  3              0.5                                 15  20            
 

                      
                             