(Analysis ratio) CO. Xyz had sales in 2009 of $15 million, total assets of $82millions, and total liabilities of $40 million. The interest rate on the firm's debt is 6% and its tax rate is 40%. The operating profit margin was 16%. Assume that interest must be paid on all debt. Determine the following key figures and interpret them

a. operating income

b. net income

c. operating return on assets

d. return on equity