1. KLATASDS-MOE, School of Statistics, East China Normal University, Shanghai, People’s Republic of China
2. Department of Statistics, Government Ambala Muslim Graduate College Sargodha, Sargodha, Pakistan
3. School of Economics and Statistics, Guangzhou University, Guangzhou, People’s Republic of China
4. Departemnt of Statistics, University of Sargodha, Sargodha, Pakistan
5. Department of Mathematics, King Fahad University of Petroleum and Minerals, Dhahran, Saudi Arabia