1. Department of Mathematics, Division of Science and Technology, University of Education, Lahore, Pakistan
2. Department of Mathematics, College of Science, Jouf University, P.O. Box: 2014, Sakaka, Saudi Arabia
3. School of Mathematics, Minhaj University Lahore, Pakistan
4. Department of Mathematics, College of Science and Arts, King Khalid University, Muhayil, 61413 Abha, Saudi Arabia
5. Department of Mathematics, University of Education Lahore, Vehari Campus, Pakistan
6. Department of Mathematics, University of Management and Technology, Lahore 54770, Pakistan