Will you please provide an answer and a clear explanation?

16. (3.6:#41) do not do part (1 Velocity from position The graph of s = t) represents the po- sition of an object moving along a line at time t Z 0. a. Assume the velocity of the object is 0 when t = 0. For what s =f(r) other values of t is the velocity of the object zero? I). When is the object moving in the positive direction and when is it moving in the negative direction? I I 0 I 2 c. Sketch a graph of the velocity function. d. On what intervals is the speed increasing