A bag contains 5 red balls, 4 blue balls, and 3 white balls. Two balls are drawn, one after the other, without replacement. Draw a tree representing the experiment and find
(a) Pr(blue on first draw and white on second draw).
(b) Pr(white on both draws).
(c) Pr(drawing a blue ball and a white ball).
(d) Pr(second ball is red).