The position of a particle moving in a straight line is given by the function s(t) = (3-612+9t+5, 120, where s() is measured in metres and t is measured in seconds. a. Find the initial position of the particle. b Find the velocity after 2 s. C. Find the acceleration after 4 s. d. Find the average acceleration from 2 s to 4 s. e. When is the particle at rest? Describe the pattern of motion