For the cash flows shown, determine the external rate of return using the MIRR method if i; = 18% per year and ib = 10% per year. Year Revenue, $ Cost, $ 0 lo -6,000 1 25,000 -30,000 2 19,000 |-7,000 3 4,000 |-6,000 14 28,000 -12,000 33.99% 17.12% 28.12% 40.21%