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Suppose that we have 4 events A, B1, B2, By such that P(A) = 1/2, and the following information is also available. " . 2 3 P(BA) 1/3 1/3 1/3 P(B;Ac) 1/2 0 1/2 where as usual Ac denotes the complement of A. (a Find P(B1), P(B2) and P(B3). (b) Find P(A B1), P(A B2)