Not in excel. $11\mathrm{.}15-($Calculating MIRR$)$ OTR Trucking runs a fleet of long$-$haul trucks and has recently expanded into the Midwest, where it has decided to build a maintenance facility. This project will require an initial cash outlay of $$20$ million and will generate an$-$ nual cash inflows of $$4\mathrm{.}5$ million per year for Years $1$ through $3.$ In Year $4,$ the project will provide a net negative cash flow of $$5,000,000$ due to anticipated ex$-$ pansion of and repairs to the facility. During Years $5$ through $10,$ the project will provide cash inflows of $$2$ million per year.

Calculate the project$$s MIRR. Is the project a worthwhile investment based on this measure? Why or why not?