(1 point) A particle moves along a straight line and its position at time t is given by 3(t) 2 2t3 211E2 + 3615 where s is measured in feet and t in seconds. Find the velocity (in ft/sec) of the particle at the time when the acceleration is 0. velocity = C] The particle changes direction twice from positive to negative at time t=o and from negative to positive at time to