The graph below presents aProduction Possibilities Frontierfor an economy producing only apples and wheat.

Consider Points A, B, C, D, E and Q.

a. Identify which points are inefficient, and explain why.

b. Which of the points are efficient? Explain why.

c. Which point(s) are infeasible. Explain why.

d. In moving from Point E to Point C, and Point C to Point D, in which case is the opportunity cost of producing apples higher? Explain why.

e. How would the PPF look different if there were constant opportunity costs of apples for wheat?

f. Describe (in words only) how the invention of a new, higher yield (more productive), strain of wheat would change the above PPF.