Does anyone know the answers to these history questions?

1. What was the reasoning behinf winston Churchill's decision to sink the French fleet? 2. The day before he invaded the soviet union, why did Hitler order his naval commanders not to attack any american vessel under any cirstances? 3. Why do you think Churchill was relieved on December 7, 1941? 4. Even though the allies had triumphed over Hitler in the second world war, what did that triumph eventually lead to? Thanks for your help!