89. Teams A, B, and C are participating in a Go team tournament, with each team consisting of 9 members. The rules are as follows: Each match involves one player from each of two teams, and the winner stays to defend the challenge, while the loser is eliminated, and another team sends one player to challenge. The tournament starts with one player each from teams A and B, and continues in this manner. If any team has all 9 members eliminated, the remaining two teams continue to compete until one of them is completely eliminated. The team of the winner of the last match is the champion. Please answer:
(1) What is the minimum number of wins for the champion team?
(2) If the champion team wins 11 matches by the end of the tournament, what is the minimum number of matches that could have been played in the entire tournament?
Reference answer: $9 ; 24$