please use excel $($IRR of uneven cash$-$flow stream$)$ Giddy Entertainment Company is considering the construction of a new amusement park. The park will have an initial cashoutlay of $$8$ million and will produce free cash flows of $$3\mathrm{.}5$ million at the end of year$1,$ $$4\mathrm{.}2$ million at the end of year $2,$ and $$2\mathrm{.}6$ million at the end of years $3$ through $5.$

What is the internal rate of return on this new amusement park?