4. Three coins are tossed once. Let A denote the event 'three heads show", B denote the event "two heads and one tail show", C denote the event" three tails show and D denote the event 'a head shows on the first coin". Which events are
(i) mutually exclusive?
(ii) simple?
(iii) Compound?
(i) mutually exclusive?
(ii) simple?
(iii) Compound?