Firms HL and LL are identical except for their financial leverage ratios and the interest rates they pay on debt. Each has $16 million in invested capital, has $2.4 million of EBIT, and is in the 40% federal-plus-state tax bracket. Firm HL, however, has a debt-to-capital ratio of 50% and pays 12% interest on its debt, whereas LL has a 30% debt-to-capital ratio and pays only 10% interest on its debt. Neither firm uses preferred stock in its capital structure. a. Calculate the return on invested capital (ROIC) for each firm. ROIC for firm LL is % ROIC for firm HL is % b. Calculate the rate of return on equity (ROE) for each firm. Round your answers to two decimal places. ROE for firm LL is % ROE for firm HL is % c. Observing that HL has a higher ROE, LL's treasurer is thinking of raising the debt-to-capital ratio from 30% to 60%, even though that would increase LL's interest rate on all debt to 15%. Calculate the new ROE for LL. %