1. Department of Mathematics, Faculty of Science, Islamic University of Madinah, Madinah 42351, Saudi Arabia
2. Department of Mathematics and Statistics, Faculty of Science and Technology, Thammasat University Rangsit Center, Pathum Thani 12120, Thailand
3. Department of Mathematics, Quaid-i-Azam University, Islamabad 45320, Pakistan
4. Department of Computing and Mathematical Sciences, Cameron University, Lawton, OK 73505, USA