1. Department of Mathematical Sciences, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
2. Department of Statistics, Faculty of Business Administration, Delta University of Science and Technology, Egypt
3. The Scientific Association for Studies and Applied Research, Al Manzalah 35646, Egypt
4. Department of Mathematics, Helwan University, Faculty of Science, Cairo, Egypt
5. Department of Mathematics, Pan African Institute of Basic Science Technology and Innovation, Nairobi, Kenya
6. Basic Science Department, Higher Institute of Engineering and Technology, El-Mahalla El-Kubra, Egypt