Describe the Judiciary Act o 1789 that established the three-part system of the federal judiciary?     Describe the three tiers of the federal judicial system in terms of the number of courts, the appointment of the judges and justices, and their core functions.   Describe the nature and the meaning of the concept of Insanity Defense. How is the insanity defense defined in the U.S. Federal Code? Discuss and elaborate on the different rules and standards of an insanity defense with examples from some selected U.S. Supreme Court cases.