Exercice 1.2
Exercice 1.3
Exercice 1.4
Exercice 1.5
Exercice 1.6
Exercice 2.2
Exercice 2.3
Exercice 2.4
Exercice 2.5
Exercice 3.2
Exercice 3.3
Exercice 3.4
Exercice 3.5
Exercice 3.6
Exercice 3.7
Exercice 3.8
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