Q4 Plot Ann's monthly mortgage payment, interest payment and principal payment in one graph. Place the figure here.

She forecasts four possible scenarios for house price appreciation (HPA).

Optimistic Case: 4.5% annual HPA, hence 4.5/12% monthly HPA

Base Case: 2.5% annual HPA, hence 2.5/12% monthly HPA

Pessimistic Case: 0% annual HPA, hence 0/12% monthly HPA

Very Bad Case: -6% annual HPA, hence -6/12% monthly HPA