The position of the front bumper of a test car under microprocessor control is given by x(t) = 2.07 m + (4.50 m/s2)t2 - (0.100 m/s6)t6.
(a) Find its position at the first and second instants when the car has zero velocity.
(b) Find its acceleration at the first and second instants when the car has zero velocity.