1. Research Scholar, Dept. of Applied Mathematics, Indian School of Mines, Dhanbad, Jharkhand 826004, India (corresponding author).
2. Assistant Professor, Dept. of Applied Mathematics, Indian School of Mines, Dhanbad, Jharkhand 826004, India.
3. Professor, Dept. of Applied Mathematics, Indian School of Mines, Dhanbad, Jharkhand 826004, India.
4. Research Scholar, Dept. of Applied Mathematics, Indian School of Mines, Dhanbad, Jharkhand 826004, India.