Define the sets A, B, C, and D as follows:

A = {-3, 0, 1, 4, 17}

B = {-12, -5, 1, 4, 6}

C = {x Z: x is odd}

D = {x Z: x is positive}

For each of the following set expressions, if the corresponding set is finite, express the set using roster notation. Otherwise, indicate that the set is infinite.

(a)A B

(b) A B

(c) A C

(d) A (B C)