11. Between 2009 and 2010, the Smartboek Printing Company's data showed that its volume of sales increased from $1,583,612 to 1,979,515; its operating income went from 712,950 to 995,877; and its earnings per share increased from 1.20 to 1.55. Calculate: a. The Degree of Operating Leverage b. The Degree of Financial Leverage c. The Degree of Combined Leverage IF