1. School of Electronics and Information, Jiangsu University of Science and Technology, Zhenjiang, China
2. Department of Mathematics, COMSATS University Islamabad, Attock Campus, Kamra Road, Attock, Pakistan
3. Department of Electrical and Computer Engineering, COMSATS University Islamabad, Attock Campus, Attock 43600, Pakistan
4. Department of Mathematics, Riphah International University, Sector I-14, Islamabad, Pakistan
5. Department of Mathematics, Pennsylvania State University, York Campus, 1031 Edgecomb Avenue, York, PA 17403, USA