A year ago, FIN 310 Corporation had sales of $600,000, operating costs of $450,000, and year- end assets (equal to its total invested capital) of $435,000. The debt-to-total-capital ratio was

25%, the interest rate on the debt was 8.2%, and the firm's tax rate was 32%. As the new CFO, you want to examine how the ROE would have been affected if the firm had used a 50% debt-to- total-capital ratio. Assume that sales, operating costs, total assets, total invested capital, and the tax rate would not be affected, but the interest rate would rise to 9.0%. By how much would the ROE change in response to the difference in the capital structure? Please show work