Run on a flat path, track or treadmill. You can use the 8/2 method of 8 minutes running, 2 minutes walking. RPE should be light - 5/6 out of 10.
Swim Drills Day. Like last week this workout is going to be about counting your strokes. Have you improved since last week? Swim 2 laps (4 lengths), and take a 1 minute break. Do this 9 more times for a total of 1,000 yards.