1. Department of Mathematics, Faculty of Science and Technology, Irbid National University, Irbid 21110, Jordan
2. Department of Mathematical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia
3. Faculty General Education and Foundation Program, Rabdan Academy, Abu Dhabi 00971, United Arab Emirates
4. Department of Basic Sciences, Faculty of Arts and Science, Al-Ahliyya Amman University, Amman 19328, Jordan