172  7

 7.1       -
.          -
   ,     -
 . ,    ,  
. 7.1,       (   ,    . 7.1) -
,           -
 ,           /-.
      (20%),    (10%), 
       .    
           (12%)
   (8%).       
 :  ,      , -
   .

				
				
				/'3^ 0
				
7 =12%			^-"	 2
	.			
 -11%				'1
				
 = 8%	^"^'^^^^^			
		D		
 =7%	--" |			
	^			
	1			
	10% 14=0 =	% 17 =	% 20 =	% <5 0 
				8

. 7.1.    ,  

     ,      -
.     , ,     -
  ,     . 7.2.    -
 X.    ,      7,  -
.  ,      ,   X,      /,.
    /         
,   X,   "    /-.   ,  
   ,    /,   
 ,      1     , 
 /,  /    ,    -
  .  ,      -
,    .

 ,   . 7.1,      ,
       11%    14%
       .   ,   
    /,,     ,  1 