consider the information contained below to answer the question:

State of econmoy profitability return $($return$-$expected return$)^2$

expansion $20\%40\%0\mathrm{.}105625$

normal $50\%5\%0\mathrm{.}00625$

recession $30\%-10\%0\mathrm{.}030625$

variance $0\mathrm{.}036025$

what is the stock's standard deviation?