Cheyenne corp. had net income of $70355 and paid dividends of $37500 to common stockholders and $15500 to preferred stockholders in 2017. Cheyenne corp. common stockholder's equity at the beginning and end of 2017 was $445000 and $590000, respectively. Cheyenne corp. return on common stockholders' equity is? 6$, 10%, 15%, 11%