Tareas.

Tarea 2: https://docs.google.com/file/d/0B0Jt6ZeI0tpGUUlpRlJEN0hYVHM/edit?usp=sharing

Tarea 3: https://docs.google.com/file/d/0B0Jt6ZeI0tpGZHVUeXVEamhCd1E/edit?usp=sharing

Tarea 4: https://docs.google.com/document/d/1Ku3Z-X7kB1BKyf8cB8SRzVRNJUNsUHXHXccRQHpYuHc/edit?usp=sharing

García Roa Andrea.