Pharma Inc. has a debt$-$to$-$equity ratio of $3.$

The firm does not hold any cash.

The yield$-$to$-$maturity on its debt is $7\%($with annual compounding$).$ The corporate tax rate is $21\%.$

The beta of the firm$$s equity is negative and equal to $0\mathrm{.}30.$

The risk$-$free rate is $4\%$ and the market risk$-$premium is $11\%.$

Suppose that the CAPM holds.

a$)$ What fraction of the firm$$s assets is financed by equity, and what fraction of the firm$$s assets is financed by debt?

b$)$ What is the firm$$s effective cost of debt $($i$.$e$.,$ the cost of debt after considering taxes$)?$

c$)$ What is the firm$$s cost of equity implied by the CAPM?

d$)$ What is the firm$$s weighted average cost of capital $($WACC$)?$