A computer consulting firm presently has bids out on three projects. Let Ai 5 {awarded project i}, for i 5 1, 2, 3, and suppose that P(A1) 5 .22, P(A2) 5 .25, P(A3) 5 .28, P(A1 ù A2) 5 .11, P(A1 ù A3) 5 .05, P(A2 ù A3) 5 .07, P(A1 ù A2 ù A3) 5 .01. Express in words each of the following events, and compute the probability of each event: a. A1 ø A2 b. A1 9ù A2 9 [Hint: (A1 ø A2)9 5 A9 1 ù A9 2] c. A1 ø A2 ø A3 d. A9 1 ù A9 2 ù A9 3 e. A9 1 ù A9 2 ù A3 f. (A9 1 ù A9 2) ø A3