1. Department of Mathematics, College of Science, King Khalid University, Abha, Saudi Arabia
2. Department of Mathematics, Institute of Arts and Sciences, Government College University Faisalabad, Chiniot Campus, Faisalabad, Pakistan
3. Department of Mathematics, Riphah International University, Faisalabad Campus, Faisalabad, Pakistan
4. Department of Mathematical Sciences, Faculty of Arts and Basic Sciences, Balochistan University of Information Technology, Engineering and Management Sciences, Quetta, Pakistan