1. Department of Computer Science, University of the Punjab, Lahore 54000, Pakistan
2. Mathematics Department, Faculty of Science, Taibah University, Al-Madinah Al-Munawarah, Saudi Arabia
3. School of Physical Sciences, University of the Punjab, Lahore 54000, Pakistan
4. Department of Mathematics, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan