1. Department of Mathematics, College of Science, University of Hail, Hail 2440, Saudi Arabia
2. Department of Mathematics, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
3. Department of Mathematics, Northern Illinois University, DeKalb, IL 60115, USA
4. Department of Mathematics, College of Science and Arts, Al-Badaya, Qassim University, Buraidah 51951, Saudi Arabia
5. Department of Mathematics, Faculty of Science, Damietta University, New Damietta 34517, Egypt