A 5.0kg toy car can move along an x axis; Figure gives Fx of the force acting

Question:

A 5.0kg toy car can move along an x axis; Figure gives Fx of the force acting on the car, which begins at rest at time t = 0. The scale on the Fx axis is set by Fxs, = 5.0 N. In unit-vector notation, what is P at
(a) t = 4.0 s and
(b) t = 7 .0 s, and
(c) What is v at t = 9.0 s?