2008 U.S. economic financial crisis: sub-prime loans

Please help me answer these problems about the economic recession and the housing crisis.

1. How did the housing market affect the 2008 economic recession?

2. Discus How did the Banks influence the behavior of borrowers.

3. Briefly describe how the president and the government reacted to the 2007 to 2009 recession, and was it the right answer?

4. What was the cause and effect of sub-prime loans?

5. Discuss the current mortgage and housing crisis in U.S.

6. Discuss the need for federal government interventions in these crisis.