Next.

Hey! The third one worked - silver key, square head. You turn the knob, and you're in. You'll ignore the lock that you definitely just ruined for the moment - you have a job to do! Just have to head to Mr. M's office, which is... somewhere here. You've been in the holdings office a few times, but you're not too familiar with it. Your brother has his office in here, so you know where that is!