C(x) denote the total cost of manufacturing x units of some product. Then C(x) is an increasing function for all x. For small values of x, the rate of increase of C(x) decreases (because of the savings that are possible with “mass production”). Eventually, however, for large values of x, the cost C(x) increases at an increasing rate. (This happens when production facilities are strained and become less efficient.) Sketch a graph that could represent C(x).