please solve 4 and 5

QUESTION 4 For the nonconventional net cash flow series shown, the external rate of return per year using the MIRR method, with an investment rate of 20% per year and a borrowing rate of 8% per year, is closest to: 0 4 Year NCF, S 0.1604 -40.000 +18,630 -29,000 +25,000 +52,055 QUESTION 5 Five years ago, an alumnus of a university donated $69.058.4 to establish a permanent endowment for scholarships. The first scholarships were awarded 1 year after the contribution. If the amount awarded each year, that is, the interest on the endowment, is $4.233.61, the rate of return earned on the fund is closest to: 0.06