Consider the game of tennis when deuce is reached. If a player
wins the next point, he has advantage. On the following point, he
either wins the game or the game returns to deuce. Assume that for
any point, player A has probability .6 of winning the point and
player B has probability .4 of winning the point.
(a) Set this up as a Markov chain with state 1: A wins; 2: B
wins; 3: advantage A; 4: deuce; 5: advantage B.
(b) Find the absorption probabilities.
(c) At deuce, find the expected duration of the game and the
probability that B will win.
