Compute the IRR on the following cash flow streams: a. An initial investment of $28,962 followed by a single cash flow of $40,390 in year 6. (Round intermediate calculations to 4 decimal places, e.g. 1.2512 and final answer to 2 decimal places, e.g. 15.25%.) IRR b. An initial investment of $988,597 followed by a single cash flow of $1,565,600 in year 4. (Round intermediate calculations to 4 decimal places, e.g. 1.2512 and final answer to 2 decimal places, e.g. 15.25%.) IRR c. An initial investment of $1,645,677 followed by cash flows of $1,317,700 and $1,067,000 in years 2 and 4, respectively. (Round answer to 2 decimal places, e.g. 15.25%.) IRR