1. Department of Mathematical and Computing Science, Thomas Adewumi University, Oko, Kwara, Nigeria
2. Department of Mathematics, University of Ilorin, Ilorin, Kwara, Nigeria
3. Department of Mathematics, Government College University, Faisalabad, Pakistan
4. Mechanical Power Engineering Department, Faculty of Engineering, Mansoura University, Mansoura, Egypt
5. Department of Mathematics and Applied Mathematics, Nelson Mandela University, Port-Elizabeth, South-Africa
6. Department of Mathematics, Federal College of Education, Iwo, Nigeria