1. Department of Mathematics and Statistics, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi 46000, Pakistan
2. Deanship of Joint First Year Umm Al-Qura University Makkah, Saudi Arabia
3. Department of General Requirements, University of Technology and Applied Sciences, Sohar, Oman
4. Department of Mathematics, Laghman University, Mehterlam, 2701, Laghman, Afghanistan