An unlevered firm has an equity value of $$20$ million. If the corporate tax rate is $30\%$ and the company refinances with $40\%$ debt, the new value of equity will be$?$

Select one:

a$.$ $$14\mathrm{.}4$ million

b$.$ $$20$ million

c$.$ $$15\mathrm{.}6$ million

d$.$ $$12$ million