The Patient Protection and Affordable Care Act of 2010 (ACA) is expected to increase insurance coverage for a significant number of Ameri­cans. But many problems in the health care system remain unresolved. Describe the following;Why health is so important to AmericansDefining characteristics      of the U.S. health care delivery systemSeven key challenges      facing the health systemStakeholders who shape and      are affected by how the health system is organized and how it functions.Use APA format, 2- 3 pages paperCitations must be peer reviewed within 5 year