1. Amity School of Engineering and Technology, Amity University Patna, Patna 801503, India
2. Faculty of Engineering, Al-Majmaah University, Riyadh, Saudi Arabia
3. Ramjas College, Department of Mathematics, University of Delhi, Delhi, India
4. Department of Mathematics, Lalit Narayan Mithila University, Darbhanga 846004, India
5. Department of Mathematics, Hansraj College, University of Delhi, Delhi 110007, India