1. Department of Statistics and Operations Research, King Saud University, Riyadh, Saudi Arabia
2. Department of Mathematics and Statistics, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia
3. Department of Mathematical Statistics, Faculty of Grdaute Studies for Statistical Research, Cairo University, Giza, Egypt
4. Department of Statistics, Mathematics and Insurance, Benha University, Benha, Egypt