1. Department of Mathematics, University of Rajasthan, Jaipur 302004, Rajasthan, India
2. Department of Mathematics and Statistics, Manipal University Jaipur, Jaipur 303007, India
3. College of Engineering and Technology, Wollega University, Nekemte, Ethiopia
4. Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, India