For each of the following facts, say whether or not it can contribute to bringing the Canadian economy back to full employment in 2021.

a) Newly elected, the new American president, Joe Biden sets up the "Buy American act".

b) The price of raw materials has been rising for a year, in particular the price of oil (Canada is a user and exporter of these resources).

c) Financial institutions increase the "stress test" before granting a mortgage loan.

d) The current federal government in Canada plans to raise the carbon tax beyond $70 per ton of GHGs emitted during the production of goods. Graph your answer starting from a full-employment short-term equilibrium.