-/4 Points] DETAILS LARCALCET7 5.1.065.MI. 0/100 Submissions Used MY NOTES ASK YOUR T Consider a particle moving along the x-axis where x(t) is the position of the particle at time t, x'(t) is its velocity, and x"(t) is its acceleration x(t) = +3 - 12+2 + 21t - 1, Osts 10 (a) Find the velocity and acceleration of the particle. x' (t) = x" (t) = (b) Find the open t-intervals on which the particle is moving to the right. (Enter your answer using interval notation.) (c) Find the velocity of the particle when the acceleration is 0. Need Help? Read It Master It /100 Submissions Used