ECON201 Southeastern University Second World War and Germany’s Development

as per attached file, 3 questions as follows:
Q. 1. During the Second World War, Germany’s factories were decimated. It also suffered many human casualties, both soldiers and civilians. How did the war affect Germany’s production possibilities curve?
Q. 2. What assumptions about the economy must be true for the invisible hand to work? To what extent are those assumptions valid in the real world? 
Q. 3. Are differences in geography behind the differences in absolute advantages?