Answer:
v = 0 m/s
s = 2.38 m/s
Explanation:
Velocity is displacement over time, where displacement is the change in position. Speed is distance over time, where distance is the length of the path.
Since the athlete ends back where she started, her displacement is zero, so her velocity is zero.
Her speed is the total distance over the total time.
s = (50 m + 50 m) / (20 s + 22 s)
s = 2.38 m/s