1. Department of Mathematics and Physics, Faculty of Engineering, Zagazig University, Egypt
2. Department of Mathematics and Statistics, University of South Florida, Tampa, FL 33620, USA
3. College of Mathematics and Systems Science, Shandong University of Science and Technology, Qingdao 266590, Shandong, China
4. International Institute for Symmetry Analysis and Mathematical Modelling, Department of Mathematical Sciences, North-West University, Mafikeng Campus, Mmabatho 2735, South Africa
5. College of Mathematics and Physics, Shanghai University of Electric Power, Shanghai 200090, China