The Treaty of Versailles

1. Who negotiated the treaty on behalf of Germany?
2. What was the most unpopular Versailles clause for the Germans? Why?
3. What's the "Stab in the Back" legend? Who was blamed for this? Who took advantage of it?
4. "This is not peace. It is an armistice for twenty years" Explain the meaning of this quote. Who enunciated it?