Shown are selected data from the 2015 annual report of CVS Health, a large drugstore chain. (Dollar amounts are in millions.) (Round your percentage answers to 1 decimal places. i.e. 0.123 as 12.3%.)

	Beginning of the Year				End of the Year
Total assets	$	74,187			$	93,657
Total stockholders' equity		37,963				37,203
Operating income						9,454
Net income						5,239

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.