prefix crossword puzzle

123456
Across
  1. 4. (Under + fed) Someone who has not been fed enough.
  2. 5. (Sub + marine) A vessel that travels under the sea.
  3. 6. (Co + pilot) A person who pilots together with another.
Down
  1. 1. (Over + sleep) To too much sleep.
  2. 2. (Non + fat) Not having fat.
  3. 3. (Super + star) A superior or very famous star.