Ex.2

https://drive.google.com/file/d/1hEnWpbSYk-Y12KUqDkLgaQz8SlyPnnUJ/view?usp=sharing

https://cours.etsmtl.ca/gpa662/documents/Cours/Arena%20Variables%20Guide.pdf?fbclid=IwAR1GY1XegUiD7PJShItIVS5STWNVbATDCFW4qJ95uh3SQ17USB9uVHq-uVg