Determine the IRR on the following projects:
a) An initial outlay of $10,000 resulting in a free cash flow of $2,146 at the end of each year for the next 10 years.
b) An initial outlay of $15,000 resulting in a free cash flow of $3,500 at the end of each year for the next 5 years.
c) An initial outlay of $10,000 resulting in a free cash flow of $1,960 at the end of each year for the next 20 years.