24. Let f be a function defined on the closed interval -3 sx S 4. The graph of f', the derivative of f, consists of one line segment and a semicircle, as shown to the right. a) On what intervals, if any, is f increasing? b) On what intervals, if any, is f concave upward? ( 4 , 2) Chraph of S' c) Find the x-coordinate of each point of inflection of the graph of f on the open interval -3