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 2017 $285,084 265,879 $8,271 $561,362 $94,245 12,229 545,337 101,230 2016 258,473 16,917 529,449 101,137 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 2017 ROE 96 96 ROA 96 96 PM AT 96 96 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