An urn contains 17 balls marked LOSE and 3 balls marked WIN. You and an opponent take turns selecting at random a single ball from the urn without replacement. The person who selects the third WIN ball wins the game. It does not matter who selected the first two WIN balls.
a. If you draw first, find the probability that you win the game on your second draw.
b. If you draw first, find the probability that your opponent wins the game on their second draw.