1. Mathematics Department, Faculty of Science, Al-Azhar University, Nasr City 11448, Cairo, Egypt
2. Mathematics Department, Faculty of Science, Taif University, Hawia (888) Taif, Saudi Arabia
3. Mathematics Department, Faculty of Science and Arts, Khulais, King Abdulaziz University (KAU), Saudi Arabia
4. Mathematics Department, Faculty of Science, Al-Azhar University (Assiut Branch), Assiut, Egypt
5. Basic Science Department, Higher Institute of Engineering, Shorouk City, Cairo, Egypt