1. Ph.D. Student, Dept. of Mathematics & Computing, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004 Jharkhand, India.
2. Associate Professor, Dept. of Mathematics & Computing, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004 Jharkhand, India (corresponding author).
3. Research Associate, Dept. of Mathematics & Computing, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004 Jharkhand, India.