I only need the answer to the last question, the first question provides more context!

How much should an investor pay for a property that is expected to generate annual triple net operating income of $250,000 for ten years with a sale value at the end of the tenth year of $4 million to achieve a 12% unleveraged compounded annual rate of return? a)$2.7 million

22) Referring to the prior question, if the investor borrows 80% of the purchase price at 6% interest-only for ten years, what will be the investors leveraged compounded before tax annual rate of return? a) 18.0% b) 28.4% c) 34.4% d) 51.5%