Compare the M’Naghten, irresistible impulse, and substantial capacity tests.

1. Compare the M’Naghten, irresistible impulse, and substantial capacity tests.
2. What is the difference between diminished capacity, and the insanity defense?
3. What was the defendant seeking to do the State v. Hornsby, 484 S.E.2d 869 (1997)? Was he successful?