Henry the Geek likes books (B) and computer games (C). We have observed that he preferred the bundle (12, 8) over (9, 15), bundle (20, 6) over (15, 10), and bundle (4, 16) over (13, 9). Assume that his preferences satisfy the properties of completeness, transitivity, and non-satiation. Indicate whether Henry prefers one bundle over another, is indifferent, or you cannot tell.
(a) Does Henry prefer (4, 17) or (8, 15)? (1) (b) Does Henry prefer (4, 15) or (12, 8)? (1) (c) Does Henry prefer (19, 7) or (13, 9)? (1) (d) Does Henry prefer (13, 9) or (9, 15)? (1)