A company has $50$ million of equity capital and $80$ million of long term debt. The long term debt capital carries an interest rate of $10\%.$ The cost of equity is estimated to be $8\%.$ Corporation tax is equal to $30\%.$

What is the weighted average cost of capital?

Question $9$Select one:

a$.$

$6\mathrm{.}46\%$

b$.$

$9\%$

c$.$

$10\mathrm{.}1\%$

d$.$

$9\mathrm{.}2\%$