1. Department of Mathematical Sciences, Federal University of Technology, Akure 340110, Ondo State, Nigeria
2. Department of Management, Dicle University, Diyarbakır 21280, Turkey
3. Department of Computer Science, Mathematics and Electronics, “1 Decembrie 1918” University of Alba Iulia, 510009 Alba Iulia, Romania
4. Department of Mathematics, Istanbul Technical University, Istanbul 34485, Turkey
5. Department of Mathematics and Statistics, Margaret Lawrence University, Galilee 321108, Delta State, Nigeria
6. Department of Physical Sciences, Mathematics Programme, Landmark University, Omu-Aran 251103, Kwara State, Nigeria