1. Department of Mathematical Sciences, Fatima Jinnah Women University, Rawalpindi, Pakistan
2. School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad, Pakistan
3. Center for Mathematical Sciences (CMS), Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
4. Department of Physics and Applied Mathematics (DPAM), Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan