1. Department of Mathematics, Texas A&M University–Kingsville, Kingsville, TX, USA. E-mail: agarwal@tamuk.edu
2. Department of Industrial Engineering, Toros University, Mersin, Turkey. E-mail: turker.ertem@toros.edu.tr
3. Department of Mathematics & Statistics, College of Engineering and Technology, American University of the Middle East, Kuwait. E-mail: agacik.zafer@aum.edu.kw