Who didn't graduate from 5 seconds of summer?

5 Seconds of Summer is a band, not a school, so the term "graduate" doesn't apply in the traditional sense. However, band member Michael Clifford has mentioned in interviews that he didn't finish high school, choosing instead to focus on his music career. The other members, Luke Hemmings, Calum Hood, and Ashton Irwin, completed their education before fully committing to the band.