1. Department of Mathematics and Statistics, Manipal University, Jaipur, India
2. School of Liberal Studies, Ambedkar University, Delhi, India
3. Faculty of Science, Department of Mathematics, Al al-Bayt University, Mafraq, Jordan
4. Department of Sciences and Technology, Ranyah University Collage, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia