1. Department of Humanities and Basic Sciences, Military College of Signals, National University of Sciences and Technology, Islamabad 44000, Pakistan
2. Department of Studies in Mathematics, University of Mysore, Mysore 570005, Karnataka, India
3. Department of Mathematics and Statistics, The University of Lahore, Lahore 54000, Pakistan
4. Faculty of Education, Van Yuzuncu Yıl University, Zeve Campus, Tuşba 65080, Van, Turkey,