Suppose that the United States limits the amount of steel that can be imported from other countries. Using a PPF that puts units of steel on the horizontal axis and units of another good, such as food, on the vertical axis, explain how such a steel import quota will affect production of food and steel in the United States and alter our consumption possibilities. Will the quota make the United States better off as a whole? If not, will it make anyone in the United States better off? Explain.