Llista 5 grans problemes: https://drive.google.com/file/d/0B-V5_gu3djdjS01zRF9hZFZqRzQ/view?usp=sharing
Arbre problema 1: https://drive.google.com/file/d/0B-V5_gu3djdjYklRakMxZTJ3b0E/view?usp=sharing
Arbre problema 2: https://drive.google.com/file/d/0B-V5_gu3djdjYklRakMxZTJ3b0E/view?usp=sharing
Arbre problema 3: https://drive.google.com/file/d/0B-V5_gu3djdjUDkyY3hFbXpCVHM/view?usp=sharing
Arbre problema 4:https://drive.google.com/file/d/0B-V5_gu3djdjNDJMWGFrTU1ldEU/view?usp=sharing
Arbre problema 5: https://drive.google.com/file/d/0B-V5_gu3djdjakdqQU9xVEp0VEk/view?usp=sharing
Llista prioritzada 5 problemes: https://drive.google.com/file/d/0B-V5_gu3djdjT3ZNLWlOTWhlSzA/view?usp=sharing
proposta problema 1:https://drive.google.com/file/d/0B-V5_gu3djdjWmMta3NQZE83OTg/view?usp=sharing
proposta problema 2:https://drive.google.com/file/d/0B-V5_gu3djdjc3pzV2pvaVIyUGs/view?usp=sharing
proposta problema 3:https://drive.google.com/file/d/0B-V5_gu3djdjbEtqY2tCQjZmQUk/view?usp=sharing

Proposta problema 4:https://drive.google.com/file/d/0B-V5_gu3djdjbUJ4WGhzeWFzYTA/view?usp=sharing