What effects would each of the following changes have on aggregate demand if other things equal? Explain why. (8 points)

Changes	Change in Canadian AD (increase or decrease)	Explain why
(a) Increase in expected return on investment
(b) Decrease in consumer confidence
(c) Decrease in the Canadian price level relative to other countries
(d) If the national incomes of our major international trading partners (such as US) were to rise