50-50 Workout

I will be out of town 10/15-10/17.  Here's a workout to do while I'm gone, or feel free to do your own thing.  This workout is called "50-50".  It is actually 2 workouts in 1.  You can break it up, or do the whole thing, whatever you prefer.

-300 Warm-up
-400/300/200/100 - Choice/Swim/30 sec rest between
-6x100 - Choice (50swim-50kick)/20 sec rest between
-8x75 - Free / fast interval pace
---------------------- Half-way!
-4x200 - Choice (build-up)/30 sec rest between
-4x150 - Free / medium interval pace
-600 - Choice (Alt 150 swim-50 kick)
-8x50 - Choice / fast interval pace
-200 Cool-down
5100 Total Yards