Each of the graphs shown below shows the position of a particle moving along the x-axis as a function of time. The vertical scales of the graphs are the same. ll! 3 ("l 1 During the indicated time interval, which particle has (a) Constant velocity (b) Greatest initial velocity (E x (c) Greatest average velocity E] v (d) Zero average velocity 3' (e) Zero acceleration ,/ (f) Positive acceleration throughout D]