So you have a horizontal tangent right over, a horizontal tangent right over there. Let me draw that a little bit neater. Right over there, a horizontal tangent right over there, and a horizontal tangent right over there. All right, the areas of the regions bounded by the x-axis in the graph of f prime on the intervals negative two to one, closed intervals from negative two to one, so this region right over here, and the region from one to four, so this region right over there, they tell us the areas are nine and 12 respectively. So that area is nine, and that area is 12. So part a, find all x-coordinates at which f has a relative maximum. Give a reason for your answer.