1. Department of Mathematics, Punjabi University, Patiala, Punjab-147002, India
2. Department of Statistics, Bolgatanga Technical University, Bolgatanga, Ghana
3. Department of Applied Sciences, Chitkara University Institute of Engineering and Technology, Chitkara University, Punjab, India
4. Department of Mathematics, College of Natural and Computational Science, Jigjiga University, Jigjiga-1020, Ethiopia