1. Department of Mathematics, College of Science, University of Ha’il, Ha’il 55473, Saudi Arabia
2. Department of Mathematics, College of Science, Qassim University, Buraydah 52571, Saudi Arabia
3. Institute of Mathematics, University of Kassel, 34125 Kassel, Germany
4. Department of Mathematics, Faculty of Science, Islamic University of Madinah, Medina 42351, Saudi Arabia
5. Department of Mathematics, Faculty of Science, University of Tabuk, P.O. Box 741, Tabuk 71491, Saudi Arabia