1. Department of Mathematics, Faculty of Science, Fayoum University, Fayoum, Egypt
2. Faculty of Business Administration, Delta University of Science and Technology, Gamasa, Egypt
3. Department of Mathematical Statistics, Faculty of Graduate Studies for Statistical Research, Cairo University, Egypt
4. Department of Mathematics, Faculty of Science, Tanta University, Tanta 31527, Egypt
5. Mathematical Sciences Department, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
6. Department of Mathematics, Faculty of Science, New Valley University, El Kharga, Egypt
7. Department of Mathematics, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
8. Department of Mathematics (Statistics Option) Program, Pan African University, Institute of Basic Science, Technology and Innovation (PAUST), Nairobi 6200-00200, Kenya