Alpha Corporation requires a funding of Rs$\mathrm{.}250$ million for its capital expenditure plans. It has decided to raise $40\%$ funding in the form of equity and the balance is in the form bonds. The cost of equity is $15\%,$ and the cost of debt, pre$-$tax is $8\%.$ The firm$$s tax rate is $30\%.$ What is the Weighted Average Cost of Capital for the firm?

a$.$

$10\mathrm{.}85\%$

b$.$

$9\mathrm{.}36\%$

c$.$

$11\mathrm{.}38\%$

d$.$

$12\mathrm{.}45\%$