Mariner Corporation reported the following on its comparative income statement: (in millions) 2017 2016 2015 Revenue.... $12,259 $11,960 $11,500 Cost of sales. $4,141 $4,040 $3,250 Perform a horizontal analysis of revenues and gross profit-both in dollar amounts and in percentagesfor 2017 and 2016. (Round your answers to two decimal places. Use a minus sign or parentheses to represent a decrease in amount or percentage.) Mariner Corporation Comparative Income Statement For The Years Ended December 31, 2017 and 2016 Increase/(Decrease) (amounts in millions) 2017 2016 2017 2016 2015 Change Percentage Change Percentage $ 12,259 $ 11,960 $ 11,500 % % 4,141 4,040 3,250 Revenue Cost of Sales Gross Profit $ 8,118 $ 7,920 $ 8,250 % %