How does Annemarie use what her uncle has taught her and her observations of Kirsti earlier behavior to deal with the German soldiers?

Annemarie uses the lessons her uncle taught her about staying calm and composed under pressure to deal with the German soldiers. She also recalls Kirsti's behavior and understands the importance of acting innocent and obedient to avoid suspicion. By combining these lessons and observations, Annemarie is able to successfully navigate encounters with the German soldiers and protect her family.