a) Explain what we mean by Demand. b) Why does the Demand curve have a downward slope? c) Explain the difference between a change in quantity demanded and a change in demand. Provide an example of each. d) Why does the Supply curve have an upward slope? e) Why would an increase in Resource prices result in a decrease in the supply curves of products in the economy? f) Why could a Price Ceiling( such as Rent Controls on Apartments) not allow the market to reach an equilibrium