Please I need help with letter b

The function s(t) describes the motion of a particle along a line. s ( t ) = 13 - 3+2 + 2t (a) Find the velocity function of the particle at any time t 2 0. v( t ) = 312 - 61 + 2 (b) Identify the time intervals on which the particle is moving in a positive direction. (Enter your answer using interval notation.) ( - 0o , - 2V/3 - 3 \\ U ( - 2V3 - 3, 2V3 - 3) U ( 2V3 - 3, 00) X (c) Identify the time intervals on which the particle is moving in a negative direction. (Enter your answer using interval notation.) 1 13 V3 3 3 (d) Identify the time(s) at which the particle changes direction. (Enter your answers as a comma-separated list.) t = 1 - V3 V3 3 1+ 3 Need Help? Read it