I am confused with this question:

Your favorite team is in the World Series. You have assigned a probability of 63% that they will win the championship. Past records indicate that when teams win the championship, they win the first game of the series 73% of the time. When they lose the championship, they win the first game 26% of the time. The first game is over and your team has lost. What is the probability that they will win the World Series?