1. Department of Mathematical Sciences, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
2. Department of Mathematics, College of Science, King Khalid University, Abha 62223, Saudi Arabia
3. Department of Statistics, Government Postgraduate College Haripur, Haripur 22620, Pakistan
4. Department of Mathematics and Statistics, Riphah International University, Islamabad 46000, Pakistan
5. Department of Statistics, University of Azad Jammu and Kashmir, Muzaffarabad 13100, Pakistan
6. Department of Mathematics, Women University of Azad Jammu and Kashmir, Bagh 12500, Pakistan
7. Department of Mathematics, Air University Islamabad Pakistan, Islamabad 44000, Pakistan