1. Department of Mathematics, Faculty of Science and Technology, Irbid National University, Irbid, Jordan
2. Faculty of Science, Department of Mathematics, Al al-Bayt University, Mafraq, Jordan
3. Department of Mathematics and General Sciences, Prince Sultan University, Riyadh, Saudi Arabia
4. Department of Medical Research, China Medical University, Taichung 40402, Taiwan
5. Department of Computer Science and Information Engineering, Asia University, Taichung, Taiwan