help with the physics

1. Make sure the video is set to trial 1. Complete the data table to make a position vs. time graph for one rotation for each of the three dots on the wheel. If a dot reaches O on the protractor, begin adding 2nt to the angular position so that the position is always increasing. Find a curve fit for each of the three dots. I need a hint Time Blue Position Red Position Black Position rad 0Blue rad 0Red rad 0 Black