1. Department of Mathematics, City University of Science and Information Technology, Peshawar 25000, Pakistan
2. Department of Basic Sciences, College of Engineering Majmaah University, P.O. Box 66, Majmaah 11952, Saudi Arabia
3. Department of Mathematical Sciences, Faculty of Science, Universiti Teknologi Malaysia (UTM), 81310 Skudai, Malaysia
4. Mathematics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt