1. Department of Mathematical Sciences, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
2. Department of Mathematics, Faculty of Science, Tanta University, Tanta 31527, Egypt
3. Department of Mathematics, Faculty of Science, Helwan University, Helwan, Egypt
4. Department of Business Administration, College of Business, King Khaled University, Abha, Saudi Arabia
5. Department of Statistics, Mathematics and Insurance, Alexandria University, Alexandria, Egypt