The graph of s = f(t) represents the 5 position of an object moving along a line at time t2 0. a. Assume the velocity of the object is t 0 when t= 0. For what other values of t is the velocity of the object zero? b. When is the object moving in the positive direction and when is it moving in the negative direction? c. Sketch a graph of the velocity function. d. On what intervals is the speed increasing? (E a. The velocity of the object is zero at t = D