Q4/ A car moves according to a law of motion s = f(t) t-12t? + 36t, t2 0, where s and t are measured in seconds and in feet, respectively. 1. When is the car at rest? 2. When is the car moving in the positive dircction? 3. Find the total distance traveled during the first 8 second. 4. Draw a diagram that illustrates the motion of the car.

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