1. College of Mathematics and Statistics, Xuzhou University of Technology, Xuzhou 221018, P. R. China
2. College of Mathematics, Huaibei Normal University, Huaibei 235000, P. R. China
3. Department of Basic Sciences, University of Engineering and Technology Peshawar, Peshawar, Pakistan
4. Department of Mathematics, University of Swabi, Swabi, Khyber Pakhtunkhwa, Pakistan
5. Department of Statistics, College of Science, University of Jeddah, Jeddah, Saudi Arabia
6. Department of Mathematics, Huzhou University, Huzhou 313000, P. R. China
7. Institute for Advanced Study Honoring, Chen Jian Gong, Hangzhou Normal University, Hangzhou 311121, P. R. China