Правильно ли составлены следующие вопросы на английском языке?

1. What type of republic is the U.S.A.?
2. When was the Constitution of the U.S.A. adopted?

3. How much members the Senate is made up?

4. What do the red stripes mean on the U.S.A. flag?

5. What are the responsibilities of the U.S.A. president?