Burgundy is contemplating what for the company is an average$-$risk investment costing $$40$ million and promising an annual ATCF of

$$6\mathrm{.}4$ million in perpetuity.

a$.$ What is the internal rate of return on the investment?

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

Note: Round your answer to $1$ decimal place.