A.
Every 4 minutes, for 20 minutes (5 sets):
Back Squat @ 20X2
*Set 1 – 5 reps @ 60%
*Set 2 – 4 reps @ 70%
*Set 3 – 3 reps @ 80%
*Set 4 – 2 reps @ 85%
*Set 5 – Max Reps @ 85%

For the max reps sets, stick to the prescribed tempo, and if the rest at the top exceeds two seconds, terminate the set.
Use the rest periods between sets to address upper body mobility or activation drills of your choice – e.g., Ring Pec Stretch, Reverse Snow Angels, Nose-to-Wall Handstand Holds, etc….