Just more three-time practice, including some three-time notation.
This is the traditional version of a tune that was once a big hit - if it sounds familiar, work out how it differs from the version you know. Notice that it starts on '3'.
Here's how the tune should have sounded (on C, Bb, Eb instruments).
An eight-bar melody to notate, - you'll need a one-flat key signature and some accidentals.
If you didn't get that right, work out why before you move on.