What is the relationship between sentencing reform Act of 1984 and the idea of prison as a vehicle for criminal rehabilitation?

Question 1
What was the purpose of the Sentencing Reform Act of 1984?

Question 2
What is the relationship between sentencing reform Act of 1984 and the idea of prison as a vehicle for criminal rehabilitation?

Question 3
What is the United States Sentencing Commission, and what is its role?

Question 4
What role does a Forensic Psychologist play in sentencing?