A runner makes one lap around a track in 68.0s. The track is oval, has two straight 100m stretches with a semicircular bend (radius of 50m) at each end.
A) What was the runner's total distance for the lap?
B) What was the runner's total displacement for the lap?
C) What was the runner's average speed for the lap?
D) What was the runner's average velocity for the lap?