In Exercises 35 and 36, the function s(t) describes the motion of a particle along a line. (a) Find the velocity function of the particle at any time t
(b) Identify the time interval(s) on which the particle is moving in a positive direction. (c) Identify the time interval(s) on which the particle is moving in a negative direction. (d) Identify the time(s) at which the particle changes direction.
