It’s not every day you get to work with a Pulitzer Prize-winning librettist as a college student. It’s even less often that you share the same alma mater. When the sixth season of the Ƶ New Opera Workshop, or Ƶ NOW, kicks off this month, one of the opera professionals mentoring composition students knows Boulder well. Mark Campbell, a 1975 graduate of the Department of Theatre and Dance, is coming back to campus for the first time in 40 years.