Following three problems

Estimated growth rate $0\%$

Revenue $$560,000$

Operational Profit $$250,000$

Net Income $$165,000$

Debt $$400,000$

Borrowing cost $6\%$

Cost of Equity $($unlevered$)15\%$

Tax $25\%$

In the world of MM II theory, what is the cost of equity?

Group of answer choices

$11\mathrm{.}73\%$

$17\mathrm{.}57\%$

$18\mathrm{.}86\%$

$19\mathrm{.}50\%$

Please show how to solve in excel.