Answer:
WACC for A: 9.05%
WACC for B: 9.50%
WACC for C: 12.20%
WACC for D: 12.65%
Explanation:
WACC for a division will be equal: Percentage of Debt in capital employed by the Division x Cost of Debt + Percentage of Equity in capital employed by the Division x Cost of equity = 50% x 6% + 50% x ( Risk free rate + Beta of each Division x Risk premium) = 3% + 50% x ( 4% + beta of each Division x Risk premium)
Risk premium for the 4 Divisions is equal to (Cost of equity for the whole firm - Risk free rate) / beta = 9%
Thus WACC for a division will be equal: 3% + 50% x ( 4% + beta of each Division x 9%).
Substitute beta of each Division from A to D provided in the question, we have: WACC for A: 9.05%; WACC for B: 9.5%; WACC for C: 12.2%; WACC for D: 12.65%.