1. School of Mathematical and Statistics, Xuzhou University of Technology, Xuzhou 2221018, Jiangsu, China
2. Nanchang Institute of Technology, Nanchang 330044, China
3. College of Mathematics, Huaibei Normal University, Huaibei 235000, China
4. Department of Mathematics, Abdul Wali Khan University, Mardan 23200, Pakistan
5. Department of Mathematics, University of Swabi, Khyber Pakhtunkhwa 23340, Pakistan