1. Tata Research Development and Design Centre, Tata Consultancy Services, Pune, Maharashtra 411013, IN.
2. Tata Research Development and Design Centre, Tata Consultancy Services, Pune, Maharashtra 411013, IN (Corresponding author), e-mail: bp.gautham@tcs.com
3. Indian Institute of Technology, Bombay, Powai, Mumbai 400076, IN.