1. Department of Mathematics and Statistics, Riphah International University I-14 Islamabad 44000, Pakistan
2. Beijing Key Laboratory for Magneto-Photoelectrical Composite and, Interface Science Department of Applied Mathematics, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, P. R. China
3. Department of Mathematics, University of Education, Lahore Attock Campus 43600, Pakistan
4. Department of Mathematics, Comsats University Islamabad, Sahiwal 57000, Pakistan
5. Department of Mathematics, Huzhou University, Huzhou 313000, P. R. China
6. Hunan Provincial Key Laboratory of Mathematical Modeling and, Analysis in Engineering Changsha University of Science and Technology, Changsha 410114, P. R. China
7. Department of Mathematics, Quaid-I-Azam University 45320, Islamabad 44000, Pakistan