In Exercise 2, we have the part of the song where the full band kicks in gear. The actual riff is similar to that of Exercise 1, but we'll be adding a couple new ideas.
Pay attention to the palm-mute markings (indicated as "P.M.") in the tablature. Be mindful of the notes that are not palm-muted as well and make sure those notes ring out for the duration of their rhythmic value.