1. Department of Mathematics, Dera Natung Government College, Itanagar, Arunachal Pradesh, India
2. Department of Mathematics, Gauhati University, Gauhati-781014, Assam, India
3. Department of General Required Courses, Mathematics, Faculty of Applied Studies, King Abdulaziz University, Jeddah 21589, Saudi Arabia
4. Operator Theory and Applications Research Group, Department of Mathematics, King Abdulaziz University, Jeddah 21589, Saudi Arabia