1. Department of Mathematics and Statistics, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 90950, Saudi Arabia
2. Department of Basic Sciences, Higher Institute of Administrative Sciences, Osim, Cairo 12961, Egypt
3. Department of Applied Statistics and Econometrics, Faculty of Graduate Studies for Statistical Research, Cairo University, Giza 12613, Egypt
4. Department of Mathematics, Faculty of Science, Tanta University, Tanta 31527, Egypt
5. Department of Mathematics and Statistics, Faculty of Management Technology and Information Systems, Port Said University, Port Said 42521, Egypt