You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: INVENTORS & INVENTION 
Clue: In April 2008, a man successfully completed a jump using a parachute designed by this man 523 years before
leonardo da vinci

Category: FAMOUS AMERICANS 
Clue: In part, using donated French tanks, he formed the U.S. Army's first tank training school in 1917
george patton

Category: THE CENSUS 
Clue: 2 of the 4 U.S. states with a population density greater than 500 people per square mile

connecticut, massachusetts, new jersey & rhode island