You have been given this probability distribution for the holding$-$period return for a stock:

Stock of the Economy Probability HPR

Boom $0\mathrm{.}4022\%$

Normal growth $0\mathrm{.}3511\%$

Recession $0\mathrm{.}25-9\%$

What is the standard deviation for the stock?

Answers must be entered with $2$ decimal places and no percent signs, e$.$g$.6$ as $6\mathrm{.}00$; $32\mathrm{.}346$ as $32\mathrm{.}35.$ Write the answer in percent. For example, if your answer is $10\%,$ write $"10\mathrm{.}00".$