A) The particle is moving upward or stationary; it never moves down because of the square, which is always >0. When t=3 v=0, so the particle is stationary. At all other times it is moving up.
B) Speed is the magnitude of velocity, but since v(t)>0 always the speed is equal to the velocity because it's always positive or zero.
C) distance=vt=t((t/3)-1)^2=0 at t=3 and 9*4=36 when t=9, and the starting distance is 4, making the total distance 36+4=40.