sir i am stuck for this question

1. What is the cardinality of each of these sets? a) b) (0) c) (0, (0} } d) (0, (0), to, (0}}} 2. Let A = (a, b, c), B = (x, y), and C = {0, 1}. Find a) AXBXC. b) CXBXA. c) CXAXB. d) B X B X B. 3. Let A = (a, b, c, d, e } and B = (a, b, c, d, e, f, g, h ). Find a) AUB. b) AnB. C) A - B. d) B - A