1. Department of Mathematics, Rajeev Gandhi Memorial College of Engineering and Technology (Autonomous), Nandyal 518501, Andhra Pradesh, India
2. School of Technology, The Apollo University, Chittoor, Andhra Pradesh 517127, India
3. Department of Mathematics, Koneru Lakshmaiah Education Foundation, Bowrampet, Hyderabad, Telangana 500043, India
4. Department of Mathematics, College of Sciences, King Saud University, P.O.Box 2455, Riyadh 11451, Saudi Arabia
5. Department of Mechanical Engineering, Sejong University, Seoul 05006, South Korea