1. Department of Mathematics, College of Science, Jazan University, New Campus, Saudi Arabia
2. Department of Mathematics, Air University Multan Campus, Multan, Pakistan
3. Department of Mathematics, Faculty of Science, Ghazi University, Dera Ghazi Khan, Pakistan
4. Department of Mathematics, The Islamia University of Bahawalpur Rahim Yar Khan Campus, Rahim Yar Khan, Pakistan