                
                         .


	      
    .   
       .
	        :

-------------------------------------
| ...(..).......       |
| ....(..).......       |
|   .(.)..       |
| .....(,,)....       |
-------------------------------------

F1  F2/+  F3  F4  F10 

	     
.   " "  ,  
        
.   "   "  , 
          
  .   " "  ,
       .
	   :
1           
    ;
2            
   ;
3        
     ;
4       
    . .
