(IRR calculation ) Determine the IRR on the following projects:

a. An initial outlay of $10, 000 resulting in a single free cash flow of $16,759 after 8 years

b. An initial outlay of $10,000 resulting in a single free cash flow of $54,808 after 15 years

c. An initial outlay of $10,000 resulting in a single free cash flow of $114,819 after 21 years

d. An initial outlay of $10,000 resulting in a single free cash flow of $14,272 after 2 years