A company is considering expansion into a new market. This will cost $$1,500,000.$ The company estimates this project will have a beta of $1\mathrm{.}1.$ The Rm$=10\%$ and the Rf$=3\%.$ The Wd is $50\%$ and the cost of equity is $4\%$ and the cost of debt is $5\%.$ The tax rate is $40\%.$ It will generate the following cash flows:

Year $1$: $$400,000$

Year $2$: $$400,000$

Year $3$: $$500,000$

Year $4$: $$250,000$

Year $5$: $$300,000$

What is WACC?

$3\mathrm{.}5\%$

$5\mathrm{.}1\%$

$6\mathrm{.}8\%$

$8\mathrm{.}4\%$

$10\mathrm{.}7\%$