You have the following information about Burgundy Basins, a sink manufacturer.

Equity shares outstanding $20$ million

Stock price per share $ $49$

Yield to maturity on debt $6\mathrm{.}5\%$

Book value of interest$-$bearing debt $ $400$ million

Coupon interest rate on debt $5\mathrm{.}4\%$

Market value of debt $ $295$ million

Book value of equity $ $510$ million

Cost of equity capital $13\mathrm{.}8\%$

Tax rate $35\%$

Burgundy is contemplating what for the company is an average$-$risk investment costing $$58$ million and promising an annual ATCF of $$5\mathrm{.}9$ million in perpetuity.

What is the internal rate of return on the investment?

Note: Round your answer to $2$ decimal places.

What is Burgundy's weighted$-$average cost of capital?