E4-6A. Return on Assets The following information was taken from Apple Inc.'s 2017 financial statements. Numbers are in millions. 2017 2016 Net income......... Total assets ............ $ 48,351 375,319 $ 45,687 321,686 Total assets . .. .... ... .... .. . .... .. ....... .. .. .. ... .. .. ... . Required a. What was Apple's return on assets for 2017 and 2016? b. Based on your answer from part a, how did the company's performance change from 2016 to 2017