Let J (x) = X 2 - 18X a) Find f'(x) and f" (x). b) Construct a first derivative sign chart to determine the intervals where f (x) is increasing or decreasing. Increasing: Decreasing: c) Use the First Derivative Test to find all relative maxima and minima. Answer as coordinate pairs. Relative maxima: Relative minima: Page 5 of 7