1. Department of Statistics, Abdul Wali Khan University, Mardan, Pakistan
2. Department of Statistics, Quaid-i-azam University, Islamabad, Pakistan
3. Department of Statistics, University of Wah, Wah Cantt, Pakistan
4. Department of Applied Mathematics and Statistics, Institute of Space Techonalogy, Islamabad, Pakistan
5. Faculty of Science and Technology, Rajamangala University of Technology Suvarnabhumi, Nonthaburi 11000, Thailand
6. Department of Mathematics, Faculty of Science, Phuket Rajabhat University (PKRU), Raddasa, Phuket 83000, Thailand