The position of a body moving along the s-axis is given by s=t^3−12t^2+36t, with s in meters and t in seconds.
(b) Find the body's velocity each time the acceleration is zero. If there is more than one answer, enter a comma separated list. If there are no answers, enter NONE.
Velocity=____________m/s
A. 6, 12
B. -6, 12
C. -6, 6
D. NONE