1. Department of Basic Sciences, University of Engineering and Technology, Taxila, Pakistan
2. Department of Mathematics, COMSATS University, Islamabad, Pakistan
3. Faculty of Science, Yibin University, Yibin 644000, China
4. Department of Mathematics, Faculty of Science in Zulfi, Majmaah University, 11952, Saudi Arabia
5. Department of Mathematics, Bonga University, Bonga, Ethiopia