FRQ 1 A graphing calculator may NOT be used for the following problem. y The gure above shows the graph of f ', the derivative of a Mice-differentiable function f, on the interval [3. 4]. Answer the following questions based on the graph of f '. a) Find all x-ooordinates at which 3' has a relative minimum. Justify your answer. b} On what open intervals contained in [3. 4] is the graph of f both concave up and decreasing? Justify your answer. c) Find the x-coordinates of all points of inection on the graph of f. d) What is the average rate of change of f ' between x = O and x = 3