1. Jazan Technical College, P.O. Box 241, Jazan 45952, Saudi Arabia
2. Department of Mathematics, Faculty of Sciences Tunis El Manar, 1060 Tunis, Tunisia
3. Mathematics Department, Faculty of Science and Arts, Khulais, University of Jeddah, Jeddah, Saudi Arabia
4. Community College of Rafha, Northern Border University, Rafha, Kingdom of Saudi Arabia