1. A cart moves according to the v vs t graph to the right. Suppose the cart starts at x = 0 at t = 0s, and moves in a straight line running east/west. We will consider EAST as the positive direction and WEST as the negative direction for this graph. a) During what time interval(s) is the car speeding ? (List each interval, for example: 650 s to 680 s, 910 s to 920 s)