1. Professor, Dept. of Applied Mathematics, Indian School of Mines, Dhanbad, 826004 Jharkhand, India.
2. Assistant Professor, Dept. of Applied Mathematics, Indian School of Mines, Dhanbad, 826004 Jharkhand, India (corresponding author).
3. Ph.D. Student, Dept. of Applied Mathematics, Indian School of Mines, Dhanbad, 826004 Jharkhand, India.