The Sixers and the Celtics play a best out of five playoff series. The series ends as soon as one of the teams has won three games. Assume that either team is equally likely to win any game independently of any other game played. Find
(a) The PMF PN (n)for the total number N of games played in the series;
(b) The PMF PW (w) for the number W of Celtic wins in the series;
(c) The PMF PL (l)for the number L of Celtic losses in the series.