1. Department of Mathemaatics and Statistics, Imam Muhammad Ibn Saud Islamic University, Riyadh, Saudi Arabia
2. Department of Mathematics, College of Science King Abdulaziz University, Jeddah, Saudi Arabia
3. Department of Mathematics, College of Science Jazan University Jazan, Saudi Arabia
4. Section of Mathematics, Department of Information Technology University of Technology and Applied Sciences, Shinas, Oman
5. Department of Industrial Engineering Faculty of Engineering King Abdul-Aziz University, Jeddah, Saudi Arabia