10 minutes between 600 and 400 and 5 minutes between 400 and 200.
600 is 800 pace or faster and the 400 and 200 are all out. What times would you want to hit for sub 2 800, sub 1:50 800, and if you average 2:30 kilometre pace (2:00 800 pace), what would your 800 time be?