Suppose a particle is moving along a straight line and its position with respect to a reference point is s = 2 - t3 7- t2 9 - t + 12 (where s is in meters and tis in seconds). (a) Find the velocity and acceleration as functions of t. (b) Find the acceleration after 1 second. (c) Find the acceleration at the instant when the velocity is 0 . Round decimal answers to 2 decimal places. (a) v(t)= + a(t)= + (b) The acceleration after 1 second is: + meters per second per second (c) The acceleration at the instant the velocity is O is: + meters per second per second