1. Department of Mathematics and Sciences, Prince Sultan University, Riyadh 11586, Saudi Arabia
2. School of Computer, Data and Mathematical Sciences, Western Sydney University, Sydney 2150, Australia
3. Department of Natural Sciences, Community College Al-Riyadh, King Saud University, Riyadh 11451, Saudi Arabia
4. Ecole Supérieure des Sciences Economiques et Commerciales de Tunis, Université de Tunis, Tunis 1938, Tunisia
5. Department of Mathematics, Faculty of Science, The Hashemite University, P.O. Box 330127, Zarqa 13133, Jordan
6. Department of Medical Research, China Medical University, Taichung 40402, Taiwan