1. Centre Régional des Métiers de l’Education et de la Formation (CRMEF), 20340 Derb Ghalef, Casablanca, Morocco
2. Laboratory of Analysis, Modeling and Simulation (LAMS), Faculty of Sciences Ben M’sik, Hassan II University of Casablanca, P. O. Box 7955 Sidi Othman, Casablanca, Morocco
3. Department of Mathematics, College of Education for Pure Science (Ibn Al-Haitham), University of Baghdad, Iraq
4. Ministry of Education, Rusafa 1, Baghdad, Iraq