1. Department of Statistics and Operations Researches, College of Science, King Saud University, Riyadh, Saudi Arabia
2. Department of Mathematics, College of Science Al-Zulfi, Majmaah University, Al Majmaah, Saudi Arabia
3. Mansoura High Institute of Engineering and Technology, Mansourah, Egypt
4. College of Engineering, Majmaah University, Al Majmaah, Saudi Arabia
5. Department of Mathematics, Faculty of Science, Mansoura University, Mansoura, Egypt