Analyzing Segment Disclosures Raytheon Company disclosed the following data related to segment sales and operating profits for fiscal 2018. Total Net Sales 2018 2017 2016 Operating Income 2018 2017 2016 $1,023 $935 $971 538 455 467 $5,804 $5,529 $6,180 6,722 6,177 6,169 7,096 8,298 7,787 921 $ millions Integrated defense systems Intelligence, information and services Missile systems Space and airborne systems Forcepoint Eliminations Total net sales 973 1,010 884 862 6,748 6,430 6,182 808 634 608 586 5 33 90 (1,514) (1,423) (1,361) $27,068 $25,383 $24,201 The company also reported the following on its balance sheet. $ millions 2018 2017 Receivables* $1,648 $1,324 * (net of allowance for doubtful accounts of $12 and $8) Required a. Which segment is largest in 2018? b. Calculate the operating profit margin for each segment and determine which segment is most profitable in 2018 by this measure. Note: Round percentage to one decimal place (for example, enter 6.7% for 6.6555%)