S6.9 - Evaluation of complex cash flow series IRR & MIRR For the cash flows shown, determine: (a) the number of possible i* values (b) the value displayed by the IRR function (c) the external rate of return using the MIRR method if i;= 18% per year and ib = 10% per year. Year Revenue, $ Cost, $ 0 1 2 3 4 0 25,000 19,000 4,000 28,000 -6,000 -30,000 -7,000 -6,000 -12,000 The number of i* values according to the rule of signs test is ((Click to select) * According to the cumulative cash flow sign test, i* value is [(Click to select) The IRR function displays i* value as %. The external rate of return according to the MIRR method is %