Watch the Banjo Roll: Rhythm 2 online guitar lesson by Joe Dalton from Big Twang

The first variation adds some hammered on notes. These notes are from the major scale and add movement and color. Be careful not to get in the way of soloists and other back up players. Again we have signature bluegrass licks within the phrases. You can hear this from most recorded bluegrass music.
Let all the notes ring while playing chorus two. In chorus three, make certain all the notes are short.