a) Distinguish between the following terms: i) Microeconomics and macroeconomics. ii) Positive and normative economics. [2 Marks]. [2 Marks] b) Using a production possibility curve, explain the concepts of scarcity and choice. [5 marks] c) Differentiate between perfectly competitive markets and monopolistic markets characteristics. [8 Marks] d) Explain the concepts of total product, total cost, average product, average cost. Use illustrations where necessary. [8 Marks]