1. Department of Math, Faculty of Science, Taibah University, Al-Madinah Al-Munawarah, Saudi Arabia
2. Department of Astronomy, Faculty of Science, Cairo University, Cairo 12613, Egypt
3. Department of Applied Mathematics, Faculty of Applied Science, Taibah University, Al-Madinah Al-Munawarah, Saudi Arabia
4. Department of Mathematics, Faculty of Science, Tanta university, Tanta, Egypt