1. Math Center, House No 87 Rahmanyia Colony, Vehari, Pakistan
2. Department of Mathematics, University of Engineering and Technology, Lahore, Pakistan
3. Faculty of Science, Yibin University, Yibin 644000, China
4. Department of Mathematics, Vehari Campus, Multan, Pakistan
5. Department of Mathematics, Al-Zulfi, Majmmah University, Al-Majmmah 11952, Saudi Arabia
6. Eastern Africa Statistical Training Center, Dar es Salaam, Tanzania