need help w all parts

Firms HL and LL are identical except for their finencial leverage ratios and the interest rates they pay on debt. Each has $24 millicn in invested capital, has $3.6 million of Earr, and is in the 25% federal-plus-state tax bracket. Firm HL, however, has a debt-to-capital ratio of 45% and pays 11% interest on its debt, whereas 1L has a 25% debt-to-capital ratio and pays on'y 10 ov interest on its debt. Neither firm uses preferred stock in its capital structure. a. Calculate the retum on invested copital (AOtC) for each fim. Round your answers to two decimal places. RDIC for firm LLI RoIC for firm HL! b. Calculate the fate of return on equity (ROE) for each firm, Round your answers to two decimul places. gos for firm LL: AOS for firm hit: c. Oeserving that it has a hipher RoE, us treasurer is thinking of raising the debt-to-capital ratio from 25% to 60 w even though that would increase u's intereat rete an af debt to 15. Calcutate the new ROE for 4L. Round your answer to two decimal places