the following table contains financial statement information for walmart inc. $ millions total assets net income sales equity 2018 $285,084 $8,271 $561,362 $94,245 2017 265,879 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