1. Department of Electrical and Automation, Wuhu Institute of Technology, Wuhu 241006, Anhui, China
2. Department of Mathematics, University of the Punjab, Lahore, Pakistan
3. Abdus Salam School of Mathematics, Gcu Lahore, Lahore, Pakistan
4. Department of Mathematics, Division of Science and Technology, University of Education, Lahore, Pakistan
5. School of Mathematics and Physics, Anhui Jianzhu University, Hefei 230601, China
6. School of Mathematics, Southeast University, Nanjing, China