An elevator car whose floor-to-ceiling distance is equal to 2.7 m starts ascending with constant acceleration 1.2

Question:

An elevator car whose floor-to-ceiling distance is equal to 2.7 m starts ascending with constant acceleration 1.2 m/s2; 2.0 s after the start a bolt begins falling from the ceiling of the car. Find:
(a)The bolt's free fall time;
(b)The displacement and the distance covered by the bolt during the free fall in the reference frame fixed to the elevator shaft.