3. Find the absolute maximum and absolute minimum ofthe following. Show all your work. a) x) : x" 7 3x3 + x2 7 8 on the interval [71.3] xz+sx+2 r 13) for) = on the interval [1,4] 4. A particle moving along a straight line will be 5 metres from a xed point at time t seconds, where t > 0 and 50) = t3 12t2 9. a) Determine the velocity and acceleration ofthe object b) Determine the position of the object when the object is at rest c) At t = 2 seconds. is the object moving to the left or right? Explain d) When is the object slowing down? (Use a table with intervals to help you)