1. Department of Mathematics and Statistics Riphah International University Islamabad Pakistan
2. Department of Mathematics Quaid‐I‐Azam University Islamabad Pakistan
3. Department of Mathematics Huzhou University Huzhou PR China
4. Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering Changsha University of Science & Technology Changsha PR China
5. Department of Mathematics and Computer Science Beirut Arab University Beirut Lebanon