Determine the IRR on the following projects:

a. An initial outlay of $13,000 resulting in a single free cash flow of $17,013 after 8 years

b. An initial outlay of $13,000 resulting in a single free cash flow of $51,288 after 14 years

c. An initial outlay of $13,000 resulting in a single free cash flow of $108,247 after 24 years

d. An initial outlay of $13,000 resulting in a single free cash flow of $14,118 after 3 years