Strap yourself in - this is very possible, just quite colourful. The idea behind this set of workouts is that you are getting 3 good rides a week that should be not only fat burning but also building some power.
Here we have some efforts at FTP pace and therefore it should all be possible, I would suggest you forget about the little lump in the middle and just let it happen, it will be over before it has started.
The final 8 mins will hurt but you have been there before and it is only 90%!