Many thanks to Connie W who spotted that some of the symbols on part 4 were not as they should be!  Here is the revised part 4 with the correct symbols corresponding to the key!  Click on the link here.

Je remercie Connie W qui a vu les symboles en erreurs sur la grille de la partie 4.  Voici la partie 4 avec les symboles justes qui correspondent à la legènde!  Cliquez sur le lien ici.