1. The experiment is to select a 3 character ID. The characters you can choose from are the letters A, B, C Repetition is allowed. a. If S is the sample space for the experiment, n(S)- b. Given the following, list all elements in each set: E1 = (The 3 letters in the code are identical) E2 (the first letter in the code is "A" E3 (The first and third letters in the code are identical but the second letter may or may not be. c. Find the probability of: i. E1 ii. E2 iv. E1 U E2