Tomorrow, January 11, the class will consist in a simulation of the final test of the course. You will be given a text where you will find both exercises and theoretical questions. Of course, the time you have at disposal (about one hour) is much less than the time you will have the day of the real test (about two hour an half). Possibly working in group of 2-3 persons, you should work first on the theoretical questions, say for 15 minutes, and you should dedicate the remaining 45 minutes to the exercises (this is more or less proportional to the amounts of time that will be allowed to theory and exercises on the day of the real test: around 30 minutes for the theory and 2 hours for the exercises). In the last part of the class I will illustrate the right solutions, hopefully with hints by you.