1. Fixed Point Research Laboratory, Department of Mathematics, Science Laboratory Building, Faculty of Science, King Mongkut's University of Technology Thonburi (KMUTT), Thrung Khru, Bangkok, Thailand
2. Department of Mathematics, Faculty of Science, Gombe State University, Gombe, Nigeria
3. Numerical Optimization Group, Bayero University, Kano, Nigeria
4. Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
5. Office of Science and Research, Yunnan University of Finance and Economics, Kunming, People's Republic of China
6. Department of Mathematical Sciences, Faculty of Physical Science, Bayero University, Kano, Nigeria