A 5.0 kg toy car can move along an x axis. The 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 = 4.0 N. In unit-vector notation, what is P→ at (a)t = 1.0 s and (b) t = 7.0 s, (c) what is v→ at t = 4.0 s? (a) Number i^ + j^ + k^ Units (b) Number i^ + j^ + k^ Units (c) Number i^ + j^ + k^ Units