  
 The Y :   
 
    0.91344  
 
 The Y :   
 
    0.87750  
 
 The Y :   
 
    0.84648  
 
 The calculated value of y(0.2):   
 
    0.84648  
 
 The exact value is of y(0.2):    
 
    0.84579  
 
 The error is :   
 
  - 0.00069  