1. Department of Mathematics, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
2. Monastir Preparatory Engineering Institute, University of Monastir, Monastir, Tunisia
3. Faculty of Science of Bizerte, University of Carthage, Jarzouna, Tunisia
4. Bizerte Preparatory Engineering Institute, University of Carthage, Jarzouna, Tunisia