Practica 20

1: 4.   A
2: 1.   A
3: 1.  X
4: 3.  A
5: 2.  X
6: 2.  X
7: 3.  X
8: 1.  A
9: 2.  A
10: 4. A
11: 3. A
12: 1. X
13: 3. A
14: 1. X
15: 1. X
16: 2. A
17: 3. X
18: 3. X
19: 2. A
20: 1. A

Manuel González y Lucas Perez Dimitroff