1. Abdus Salam School of Mathematical Sciences, Government College University, Lahore 54600, Pakistan
2. Department of Mathematics, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
3. School of Energy and Power Engineering, Jiangsu University, P.O. Box 28, Zhenjiang, Jiangsu, 212013, P. R. China
4. Department of Basic Sciences, College of Science and Theoretical Studies, Saudi Electronic University, Riyadh11673, Kingdom of Saudi Arabia