The bass is the only remaining instrument, so Lucy must play the bass. The passage states that "Mary plays the flute" and "Pete plays the trumpet" - those are both wind instruments. It then specifies that "Lucy doesn't play a wind instrument." Since all other instruments have already been accounted for, the only remaining option is the bass guitar. Therefore, based solely on the information given, Lucy must be the bass player. <|end_of_text|> ```