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First Author:
 
Zahid Asghar
Quaid-i-Azam University, Islamabad
g.zahid@gmail.com
 
Quaid-i-Azam University, Statistics
Islamabad, 44000, Pakistan
 
0092-300-9121940(Phone)
0092-300-9121940(Fax)

Second Author:

Nighat Jahandad
Quaid-i-Azam University, Islamabad
nighatparveen@yahoo.com