1. Department of Mathematics, College of Science, Qassim University, P.O. Box 6644, Buraydah 51452, Saudi Arabia
2. Department of Mathematics, Faculty of Science, Zagazig University, P.O. Box 44519, Zagazig, Egypt
3. Department of Mathematics, Faculty of Science, Taibah University, Madinah, Saudi Arabia
4. Arab Academy for Science, Technology and Maritime Transport, P.O. Box 1029, Alexandria, Egypt
5. National Committee for Mathematics, Academy of Scientific Research and Technology, Cairo, Egypt
6. Council of Future Studies and Risk Management, Academy of Scientific Research and Technology, Cairo, Egypt