1. Department of Mathematics, DAV (PG) College, Maharaja Suhel Dev State University, Azamgarh, Uttar Pradesh 276001, India
2. Department of Mathematics, Meerut College Meerut, Uttar Pradesh 250003, India
3. Department of Industrial Engineering, Yonsei University, 50 Yonsei-ro, Sinchon-dong, Seodaemun-gu, Seoul 03722, South Korea
4. Center for Global Health Research, Saveetha Medical College, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu 600077, India