4) You purchased a property with cash for $227,000, and received income of $21,000 in year 1, $20,000 in year 2, $14,200 in year 3, $31,000 in year 4, $31,500 in year 5, and sold the property at the end of year 5 for $245,200. a) If the investor requires a 10% return, what is the NPV? (5pts) b) What is the IRR on this investment? (5pts)