On January 1, 2022, Indigo Corporation purchased 4,500 shares of treasury stock. Other information regarding Indigo Corporation is provided as follows.

On January 1, 2022, Indigo Corporation purchased 4,500 shares of treasury stock. Other information regarding Indigo Corporation is provided as follows. 2022 2021 Net income $110,450 $105,000 Dividends on preferred stock $36,750 $36.750 Dividends on common stock $21,800 $18,550 Weighted average number of common shares outstanding 37,300 52,000 Common stockholders' equity beginning of year $728,000 $572,000 Common stockholders' equity end of year $746,000 $728.000 (a) Compute return on common stockholders' equity for each year. (Round answers to 1 decimal place, e.g. 15.2.) 2022 2021 Return on common stockholders' equity % %