Depends on YOUR speed
I doubt at your speed there is much acc going on after 5or so Mtrs into the 20m fast segment.
If there is, your going way too slow in the 1st 20m. Not that it has to be fast, but a high 10sec/low 11sec 100m runner isn’t going to acc all that much in these drills. You’ll hit top speed quickly then it’s over before you know it.