Rent and watch the movie "The Big Short" and answer the following questions

please help if you have seen this movie

1. What does Wall Street have to do with home mortgages? Should Wall Street have its hand in home mortgages?| 2. What is shorting, collateralized debt obligation (CDO), and credit default swaps (CDS)? Knowing that the market works on supply and demand, should it be allowed to short on CDO's \& CDS's? 3. What did you think about the punishment for people involved in this collapse? 4. What are your thoughts on the credit rating agencies? As a business did they have an obligation to the public? 5. Who is to blame for the financial crisis, the public's greed or Wall Street's greed