The position of a particle as a function of time is given by x = (6 m/s)t + (-2 m/s2)t2.
(a) Plot x versus t for t = 0 to t = 2 s.
(b) Find the average velocity of the particle from t = 0 to t = 1 s.
(c) Find the average speed from t = 0 to t = 1 s.