1. Department of Mathematics, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia
2. Department of Mathematics, Aligarh Muslim University, Aligarh 202002, India
3. Mathematics Section, Women’s College, Aligarh Muslim University, Aligarh 202002, India
4. Department of Mathematics and Natural Sciences, Prince Mohammad Bin Fahd University, P.O. Box 1664, Al Khobar 31952, Saudi Arabia