1. Department of Mathematics, Pachhunga University College, Mizoram University, Aizawl 796004, India
2. Basic Science Department, Modern Academy for Engineering and Technology, Maadi 4410242, Egypt
3. Department of Mathematics, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
4. Department of Mathematics and Computer Science, Mizoram University, Aizawl 796004, India
5. Department of Pure Mathematics, University of Calcutta, 35, Ballygaunge Circular Road, Kolkata 700019, India