1. Department of Mathematics, University of Peshawar, Peshawar 25000, Pakistan
2. Financial Mathematics and Actuarial Science (FMAS)-Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
3. Department of Mathematics, University of Sáadah, Sáadah 1872, Yemen
4. Saudi Arabia-Alqunfudah Mathematics Department, Al-Qunfudah University College, Umm Al-Qura University, Mecca, Saudi Arabia
5. Department of Mathematics and Statistics, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia