1. Department of Mathematics and Statistics, College of Science, King Faisal University, Al Ahsa 31982, Saudi Arabia
2. Department of Mathematics, Faculty of Education for Pure Sciences, University Of Anbar, Ramadi, Anbar
3. Department of Mathematics, University of Management and Technology, Lahore 54000, Pakistan
4. College of Computing, Informatics and Mathematics, UiTM Cawangan Negeri Sembilan, Kampus Seremban, 72000 Negeri Sembilan, Malaysia
5. Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor DE, Malaysia