1. Department of Computer Science/Mathematics, Novena University, Ogume, Delta State, Nigeria
2. Department of Mathematical Science, Federal University of Technology Akure, Akure, Nigeria
3. Department of Mathematical and Physical Sciences, Afe Babalola University, Ado Ekiti, Nigeria
4. Department of Mathematics, Hamedan Branch, Islamic Azad University, Hamedan, Iran
5. Department of Mathematics, Taiz University, Taiz 96704, Yemen
6. Department of Mathematics, Roots College International, DHA 1, Islamabad, Pakistan