Three runners run a 10 metre race. Each runner runs according to the following rules:
Runner 1: s = 2.4 + 0.75t
Runner 2: s = 0.2t(t - 5.1)
Runner 3: s = 0.2t(t - 5.1)(t - 9.1)
Where displacement (s) is in metres and time (t) is in minutes.
Calculate for each runner: their starting position, any changes in direction over the race (when and where it happened) and their finishing time for the race