Exercise 2: One company's ID cards consist of 3 letters followed by 2 digits. How many cards can be made? (12pts) a) If repetitions are allowed in both letters and digits? b) If repetitions are not allowed in both letters and digits? Exercise 3: The probability that a person owns a microwave oven is 0.8, that a person owns a compact disk player is 0.3, and that a person owns both a microwave and a CD player is 0.16. Find the probability: (181118) a) That a person owns either a microwave or a CD player. b) That a person owns microwave given that a CD player. c) That the person did not own either one