Show in a diagram the effect on the demand curve, the supply curve, the equilibrium price, and the equilibrium quantity of each of the following events.

a. The market for steel in Canada: Fuel efficiency regulations have reduced the use of steel in automobile production and increased the use of lighter materials such as aluminum AND import restrictions limit the amount of steel that can be imported into Canada.

b. The market for international airline tickets: Incomes decline due to a recession AND Norwegian Airlines adds more Canadian cities to its list of international flight destinations.