  
 i) k =    
 
    0.01  
 
 ii) P(X<=5) =    
 
    0.25  
 
 iii)PDF a) fX(x) =   
 
    0.02x   
 
   for 0<x<=10   
 
    b)fX(x) =    
 
    0.  
 
   -infinte<x<=0,10<x<infine   
 
 iv) P(5<X<=7) =   
 
    0.24  