The financial statements for 2012 and 2013 for Time Warner Inc. are shown in this popup window, EEB, and those for Walt Disney Co. are shown in this popup window, EE3 a. How did Time Warner's profit margins change from 2012 to 2013? To what would you attribute the differences? Answer the same question for Disney. b. Compare the profit margins between Time Warner and Disney. How are they different? How would you explain these differences? c. What differences do you notice in the common-sized balance sheets that might indicate that one of the firms is doing better than the other? a. How did Time Warner's gross profit margin change from 2012 to 2013? 0 % (Round to one decimal place.)