Hi, I am a grad student and share an office with 4 other grad students. I have a question about one of the students. We have been in the same office for 2 yrs. The student mostly sleeps while they are here. Every day this week, the student has slept from almost the moment they get in. I even hear an alarm go off on their phone if they have to teach, which seems to imply they plan on sleeping while they are here. Should I say anything to the student or continue to keep my mouth shut? It bothers me because this student is taking up a spot in the department, not to mention the department is paying them.