1. Abdus Salam School of Mathematical, Government College University, Katchery Road, Lahore 54000, Pakistan
2. Department of Mathematics, Federal University of Technology, Owerri 460114, Nigeria
3. Department of Mathematics, Faculty of Science, King Khalid University, Abha 62529, Saudi Arabia
4. Department of Electrical and Electronic Engineering, School of Computing and Engineering, College of Science and Engineering, University of Derby, Derby DE22 3AW, UK
5. Department of Biochemistry, Federal University of Technology, Owerri 460114, Nigeria