Compute the IRR for the following project cash flows:

a$.$ An initial outlay of $$3,562,200$ followed by annual cash flows of $$644,360$ for the next eight years. $($Round final answer to $2$ decimal places, e$.$g$.15\mathrm{.}25\%.)$

IRR of the project is $\%.$

b$.$ An initial investment of $$38,474$ followed by annual cash flows of $$10,944$ for the next five years. $($Round final answer to $2$ decimal places, e$.$g$.15\mathrm{.}25\%.)$

IRR of the project is $\%.$

c$.$ An initial outlay of $$11,400$ followed by annual cash flows of $$2,850$ for the next seven years. $($Round final answer to $2$ decimal places, e$.$g$.15\mathrm{.}25\%.)$

IRR of the project is $\%.$