Computing Return on Equity and Return on Assets The following table contains financial statement information for Walmart Inc. $ millions Total Assets Net Income Sales Equity 2018 $241,225 $8,004 $535,845 $79,746 2017 224,974 11,834 520,549 85,656 2016 218,708 16,372 505,383 85,578 a. Compute return on equity (ROE) for the two recent years. b. Compute return on assets (ROA) for the two recent years. c. Compute profit margin (PM) for the two recent years. d. Compute asset turnover (AT) for the two recent years. Round ROE, ROA and PM to one decimal place (example: 0.2345 = 23.5%). Round AT to two decimal places (example: 1.35). 2018 096 ROE ROA PM 2017 0 % 096 096 0 % 096 AT 0 0 e. Which of the following best explains the change in ROA during 2018? OThe company's profitability weakened considerably. OThe company's asset productivity weakened considerably. OThe company had higher sales in 2018. OThe company had higher assets 2018