1. Define iron triangle and give an example of one. 2. What is Medicare? 3. Identify three major contributions of the New Deal to social policy. Research Question: 4. What are three reasons for the increased costs of health care coverage in the U.S.? You must cite all sources used in answering this question. 7. In your opinion, what are the greatest social policy challenges of the 21st century? Please answer these 4 questions. the last need to have cited sources.