Hi please help in these questions.

08. What conditions would cause the Bank of Canada to strongly consider raising their key policy interest rate? What factors would cause them to strongly consider lowering their interest rate? 11. Explain how the exchange rate for the Canadian dollar is determined. What happens to the rate if someone from the U.S. buys Canadian products or services? 13. If interest rates are increased to be higher in Canada than in the U.S. how does it affect the exchange rate for the Canadian dollar