1. Department of Mathematics, College of Science, Jouf University, Sakaka P.O. Box 2014, Saudi Arabia
2. Department of mathematics, College of Science and Arts in Gurayat, Jouf University, Gurayat 77454, Saudi Arabia
3. Laboratory of Probability and Statistics, Faculty of Sciences of Sfax, University of Sfax, Sfax 3029, Tunisia
4. Department of Mathematical Sciences, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia