Computing Return on Equity and Return on Assets The following table contains financial statement information for Wal-Mart Stores, Inc. (a) Compute the return on equity (ROE) for 2012 and 2013. (Round your answers to one decimal place.) (b) Compute the return on assets (ROA) for 2012 and 2013. (Round your answers to one decimal place.)

($ millions)	Total Assets	Net Income	Sales	Equity
2013	$203,105	$16,999	$469,162	$81,738
2012	193,406	15,699	446,950	75,761
2011	180,782	16,389	421,849	71,247