Infоrmаtiоn fоr questions 21-25 The grаphs below show the production possibilities curves (PPC) for the U.S. аnd Canada, which both produce cars and wheat. Initially suppose that the two countries trade only with each other. Careful: the figures are not on the same scale, don’t use the scale for any answers. Instead use your reasoning and calculations. Based on the graphs above, which of the following is true?