Why does the woman ask the man to attend some interviews?

M: Hi, Margaret. I haven’t seen you since we moved the music school into this building last month. How’s it going?
W: I’ve been busy hiring more music teachers, now that we can offer more classes with the larger space. By the way, we’re interviewing some violin instructors today—since you’re our most experienced violin teacher, I’d really like you to be there.
M: Well, I scheduled a make-up class for a student who missed his lesson yesterday, so I’m not available this morning. But if you have any afternoon interviews scheduled, I could definitely be there.
W: That’s great. Here’s a copy of the interview schedule. We’ll be meeting in the auditorium.
68.According to the man, what did the music school do last month?
69.Why does the woman ask the man to attend some interviews?
70.Look at the graphic. Who will the man help interview today?