1. Department of Applied Mathematics, Kongju National University, Chungcheongnam-do 32588, Republic of Korea
2. Department of Mathematics, Sri Eshwar College of Engineering, Coimbatore 641202, Tamil Nadu, India
3. Department of Mathematics, Sri G.V.G. Visalakshi College for Women, Udumalpet 642128, Tamil Nadu, India
4. Department of Mathematics, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India