5) Opportunity costs are demonstrated by the a) Supply curve b) Demand curve c) Production possibility curve d) Business cycle 6) All of the following are roles of government in a market economy, except: a) Ensuring equity b) Providing public goods c) Determining what is produced d) Enforcing regulations 7) An economy is not reaching its potential when which of the following is high? a) Gross Domestic Product b) Unemployment c) Prices d) Employment 8) The difference between Nominal Gross Domestic Product and Real Gross Domestic Product is: a) Nominal Gross Domestic Product is measured in constant prices b) Real Gross Domestic Product is measured in constant prices c) Nominal Gross Domestic Product includes taxes d) Real Gross Domestic Product is measured in current prices