a. Draw the production possibilities frontier on a scale diagram, with the production of X on the horizontal axis and the production of Y on the vertical axis. Annual Production of X Annual Production of Y 0 1300 20 1200 45 900 60 600 70 350 75 0 b. If the economy is producing 45 units of X and 900 units of Y, what is the opportunity cost of producing an extra 15 units of X. Show on graph. C. If the economy is producing 20 units of X and 800 units of Y, what is the opportunity cost of producing an extra 10 units of X. Show on graph