7 A farm grows wheat and produces pork. The marginal cost of producing each of these products increases as more of it is produced.

a Make a graph that illustrates the farm’s PPF.

b The farm adopts a new technology that allows it to use fewer resources to fatten pigs. On a graph show the impact of the new technology on the farm’s PPF.

c With the farm using the new technology described in part (b), has the opportunity cost of producing a tonne of wheat changed? Explain and illustrate your answer.

d Is the farm more efficient with the new technology than it was with the old one? Why?