This was given to a guitar student to introduce a 4:3 polyrhythm strumming pattern. It's a 4:3 polyrhythm because you have 4 chords evenly spaced across 3 beats. The two 8th notes in beat 4 are there to fill out the rest of the bar.
Here is the Guitar Pro 6 tab for this lesson:
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John Taylor - guitar and bass instructor for Mile High Shred.