Consider the following production possibilities frontier (PPF) showing the trade-off in production between diamonds and surf boards. L R R R PR Diamonds 10 Surf Boards (000} 250 350 450 550 650 (a) State the production levels of diamonds and surf boards if this economy produces at Point b on its PPF. (1 mark) (b) What is the opportunity cost of a surf board per diamond if this economy moves production from Point b to Point ? (2 marks) (c) Explain why the opportunity cost you calculated in Part (b) increases as we move down the PPF. (2 marks)