The following are recent prices of Hawthorne Corporation common stock.

month	stock price
April	$45
May	$42
June	$46
July	$47.57
August	$53.26
September	$55.61
October	$63.69

Based on the monthly holding-period returns, what is the standard deviation for this stock? SET YOUR CALCULATOR TO 4 DECIMAL PLACES AND ROUND TO 2 DECIMAL PLACES AT THE END. DO NOT ENTER THE % SYMBOL. IF YOUR ANSWER IS 5.6222 ENTER IT AS 5.62. DO NOT ENTER YOUR ANSWER AS 0.0562.