What was missing that the court indicated was needed in order to find that the mandate was constitutional? What was the purpose of the courts discussion of a healthy diet?

Case Analysis over court case

National Federation of Independent Business v. Sebelius 132 S. Ct. 2566 (2012)

Please do apa format with the Facts, Issue, Holdings, and Legal Conflict plus these 3 questions at the end:

1. What was missing that the court indicated was needed in order to find that the mandate was constitutional?
2. What was the purpose of the courts discussion of a healthy diet?
3. What sources does the court rely on for constitutional interpretation?