1. Department of Mathematics, College of Science, University of Ha'il, Ha'il 2440, Saudi Arabia
2. Department of Basic Sciences, Preparatory Year Deanship, King Faisal University, Al-Ahsa, 31982, Saudi Arabia
3. Department of Computer Science and Mathematics, Lebanese American University, Beirut Lebanon
4. Department of Mathematics, Abdul Wali Khan University Mardan 23200, Pakistan