1. Department of Mathematics and Statistics, College of Science, P.O. Box 11099, Taif University, Taif 21944, Saudi Arabia
2. Department of Physics and Engineering Mathematics, Faculty of Electronic Engineering, Menoufia University, Menouf 32952, Egypt
3. Assistant Professor, Department of Mathematics, National P.G. College, Barhalganj, Gorakhpur 273402, Uttar Pradesh, India