1. Department of Mathematics, Institute of Science, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India
2. Department of Computer Science and Engineering, Prime University, Mirpur-1, Dhaka, Bangladesh
3. Department of Mathematics, Sidho-Kanho-Birsha University, Purulia 723104, West Bengal, India
4. Faculty of Engineering, Kuwait College of Science and Technology, Doha District, Kuwait