1. Department of Statistics, St. Anthony’s College, Shillong, Meghalaya 793001, India
2. Department of Mathematics, Nazarbayev University, Astana 010000, Republic of Kazakhstan
3. Department of Applied Mathematics, Northwestern Polytechnical University, Xi’an, Shaanxi, 710072, China
4. Department of Statistics, Central University of Haryana, Mahendergarh 123031, India