1. Faculty of Computing Department of Statistics, The Islamia University Bahawalpur, Punjab, Pakistan
2. Department of Mathematics, College of Science, Qassim University, Buraydah, Saudi Arabia
3. Department of Mathematics, Faculty of Science, Tanta University, Tanta, Egypt
4. Department of Mathematics, School of Arts and Science, Brikama Campus, University of The Gambia, Brikama, Gambia