Need help with questions 4-7.

When you buy the house just for self-use, what's your conclusion (Cash vs Mortgage, which is better) now based on IRR, explain. Now go back to case 1, think of areas with lower Rent-to-Price Ratios (e.g., San Fransisco, NYC). Try at least three Rent-to-Price ratios: 8%,5.5% and an even lower one, and discuss your findings regarding 'Cash vs Mortgage, which is better, by IRR criterion'. Discuss/digest/summarize your If-Then findings so far. Q\#7 (op Discuss any additional insights you may have gathered from this exercise (e.g., see the effects of inflation rates on the scenatios; redo Q\#5 by accounting for inflation)