What legal authority do these documents provide for decision making by family and/or healthcare providers?

Advance Directives—research and discuss the legal and ethical basis for Advance Directives such as the Living Will and Durable Power of Attorney for Healthcare. Why are these documents so valuable in healthcare situations? What legal authority do these documents provide for decision making by family and/or healthcare providers? Briefly discuss a situation in which a Living Will might apply and would be of benefit to those involved. Once you have researched and discussed Advance Directives, draft a sample Living Will, indicating the type of content that should be found in such a document.