1. Department of Mathematics and Statistics, Hazara University, Mansehra, Pakistan
2. Department of Mathematics, Cankaya University, Ankara, Turkey d Institute of Space Sciences, Magurele, Romania
3. Institute of Space Sciences, Magurele, Romania
4. Faculty of Engineering and Technology, Future University, Cairo, Egypt
5. Department of Basic Science, Faculty of Engineering at Benha, Benha University, Benha, Egypt
6. Department of Mathematics, Zagazig Faculty of Engineering, Zagazig University, Zagazig, Egypt