1. Department of Mathematics and Statistics, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11432, Saudi Arabia
2. Department of Mathematics, College of Science, Alkharj, Prince Sattam University, Saudi Arabia
3. Central Agency for Public Mobilization & Statistics (CAPMAS), Cairo, Egypt
4. The Higher Institute of Commercial Sciences, Al Mahalla Al Kubra, Algarbia 31951, Egypt