A runner in a race takes 2.7 seconds to go from the 40 meter mark to the 70 meter mark.
(a) What is the runner's speed (in m/s)?
(b) How far (in m) would the runner go in 8 seconds if this speed is maintained?
(c) How long (in s) did it take the runner to cover the first 40 m (assuming the same speed was maintained)?