Compute the IRR on the following cash flow streams:

(a.) An initial investment of $27,775 followed by a single cash flow of $45,590 in year 6. (Round intermediate calculations to 0 decimal places, e.g. 1,251 and final answer to 2 decimal places, e.g. 15.25%.) IRR _______ %

(b.) An initial investment of $833,320 followed by a single cash flow of $1,240,600 in year 4. (Round intermediate calculations to 0 decimal places, e.g. 1,251 and final answer to 2 decimal places, e.g. 15.25%.) IRR ______ %

(c.) An initial investment of $2,169,285 followed by cash flows of $1,834,400 and $1,144,900 in years 2 and 4, respectively. (Round intermediate calculations to 0 decimal places, e.g. 1,251 and final answer to 2 decimal places, e.g. 15.25%.) IRR _______ %