Suppose that an economy's production consists of two types of commodities, X and Y. a. Draw the economy's production possibilities frontier (PPF), assuming increasing opportunity cost of production. b. Explain how an increase in the price of Y per unit (assuming no change in the price of X) will affect the point on the frontier at which the economy operates. Use your diagram from part (1). c. Explain and redraw the PPF if a major technical innovation occurs which assists in the production of X (and only X).