Let A, B, and C denote events.
(a) Show that A is independent of itself if and only if P(A) = 0 or 1.
(b) Suppose P(A) > P(B) > 0 and P (A | B) = P (B | A). Show that A and B are mutually exclusive.
(c) Suppose that A, A ∩ B, and A ∪ Beach is independent of C. Show that B is also independent of C.
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