1. Department of Mathematics, Govt. College Women University Faisalabad , Faisalabad 38023 , Pakistan
2. Department of Mathematics, Govt. College University Faisalabad , Faisalabad 38023 , Pakistan
3. Department of Statistics and Operations Research, College of Science, King Saud University , P.O. Box 2455 , Riyadh 11451 , Saudi Arabia
4. Section of Mathematics, International Telematic University Uninettuno, Corso Vittorio , Emanuele II, 39 , 00186 Roma , Italy
5. Operational Research Center in Healthcare, Near East University, Near East Boulevard , PC: 99138 Nicosia/Mersin 10 , Turkey