1. Department of Mathematics, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
2. Department of Mathematics, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
3. Department of Statistics, Yazd University, P.O. Box 89175-741, Yazd, Iran
4. Department of Mathematics and Statistics, University of Dodoma, P.O. Box: 259, Dodoma, Tanzania
5. Department of Statistics, University of Malakand, Dir (L), Chakdara, Khyber Pakhtunkhwa, Pakistan