Kingbird Corporation had net income of $168900 and paid dividends of $45500 to common stockholders and $17000 to preferred stockholders in 2017. Kingbird Corporation's common stockholders' equity at the beginning and end of 2017 was $880000 and $1080000, respectively. Kingbird Corporation's return on common stockholders' equity was O 15.50% O 12.50%. O 17.50% O 11.50%