1. Institute of Computing Science and Technology, Guangzhou University, Guangzhou 510006, China
2. Department of Mathematics, University of Poonch, Rawalakot, Azad Kashmir, Pakistan
3. Department of Mathematics and Statistics, University of Lahore, Lahore 54000, Pakistan
4. NUST Institute of Civil Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology, Sector H-12, Islamabad, Pakistan