1. Department of Computer Sciences, Faculty of Computer Science and Information Technology, Northern Border University, Arar, Saudi Arabia
2. Faculty of Sciences, University of Tunis El-Manar, Tunis, Tunisia
3. Mathematics Department, Faculty of Sciences, University of Tunis El-Manar, Tunis, Tunisia
4. Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia