1. Department of Physics and Engineering Mathematics, Faculty of Electronic Engineering, Menoufia University, Menouf, Egypt
2. Department of Mathematical and Computer Sciences, University of Medical Sciences, Ondo City, Nigeria
3. Department of Epidemiology and Biostatistics, School of Public Health, University of Medical Sciences, Ondo City, Nigeria
4. Department of Mathematics, Federal University of Technology Owerri, Imo state, Nigeria
5. Abdus Salam School of Mathematical Sciences, Government College University, Lahore, Pakistan
6. Department of Mathematics, Federal University of Technology Minna, Minna, Niger