$1\mathrm{.}5.$ Regarding the additional information given below;

Common stock market price, December $31,2006....15\mathrm{.}00$ dollar

Common stock market price, December $31,2005.....14\mathrm{.}00$ dollar

Annual cash dividends per share in $2006...........0\mathrm{.}60$ dollar

Annual cash dividends per share in $2005...........0\mathrm{.}30$ dollar

Compute the following for $2006$ and $2005$:

a$)$ return on common stockholders$$ equity,

b$)$ price$-$earnings ratio on December $31$

c$)$ dividend yield.