Shown are selected data from a recent annual report of CVS Health, a large drugstore chain. (Dollar amounts are in millions.) Beginning of the Year End of the Year Total assets $ 94,462 $ 95,131 Total stockholders' equity 36,834 37,695 Operating income 9,517 Net income 6,623 a. Compute for the year CVS Health's return on average total assets. b. Compute for the year CVS Healths return on average total stockholders equity.