Compute the IRR on the following cash flow streams:

a. An initial investment of $22,986 followed by a single cash flow of $34,690 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 $1,074,075 followed by a single cash flow of $1,580,000 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 $2,175,412 followed by cash flows of $1,774,000 and $1,140,700 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 %