Can anyone help me compute these?

Based on the information in these financial statements, compute the 2014 return on common stockholders' equity, debt to assets ratio, and return on assets for each company.(Enter negative amounts using either a negative sign preceding the number e.g. -45 or parentheses e.g. (45). Round answers to 1 decimal place, e.g. 15.2%.)

Amazon.com

Wal-Mart Stores

Return on common stockholders' equity

%Debt to assets

%Return on assets

Payout ratio