I can explain these graphs by knowing that it his at steady speed at the first five seconds, goes into stationary for three seconds, goes at a fast and steady speed for four seconds, goes into stationary for two seconds, and it goes to a "zero point" in the last six seconds.
Steady Speed: 0 - 5 seconds
Stationary: 5 - 8 seconds
Fast and Steady Speed: 8 - 12 seconds
Stationary: 12 - 14 seconds
Zero Point: 14 - 20 seconds
