Two teams A and B are playing against each other in atournament. The first team to win 3 games is the champion. In eachof the games, A has a probability of 0.25 to win, independent ofthe outcome of the previous games. Let random variable X representthe number of the games played.
(b) compute the PMF Px(x)
(d) During the tournament, team A was not able to win thetournament after the first 4 games. Compute the conditional PMFPX|X>4 (x)
