1. Department of Mathematics, Faculty of Science, The University of Jordan, Amman 11942, Jordan
2. Department of Mathematics, Abbottabad University of Science and Technology, Abbottabad 22500, Pakistan
3. Department of Mathematical Sciences, United Arab Emirates University, Al Ain 15551, United Arab Emirates
4. Department of Basic Science, College of Science and Theoretical Studies, Saudi Electronic University, Riyadh-11673, Saudi Arabia