1. Department of Mathematics, University of Gujrat, Gujrat 50700, Pakistan
2. Department of Mathematics, Quaid-I-Azam University, Islamabad 44000, Pakistan
3. LSEC and ICMSEC, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, School of Mathematical Science, University of Chinese Academy of Sciences, Beijing 100190, China
4. Department of Mathematical and Computer Modeling, Al-Farabi Kazakh National University, Almaty, Kazakhstan
5. Department of Mathematical and Computer Modeling, Kazakh British-Technical University, Almaty, Kazakhstan