(Expected return and risk) The following data represent returns for the common stocks over a one-year...

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(Expected return and risk) The following data represent returns for the common stocks over a one-year period. Probability Returns Google 0.1 -20% ATT -10% 0.2 8% 4% 0.2 29% 13% 0.3 -18% 20% 0.2 4% -6% The standard deviation of Google return is %. (Keep the sign and two decimal numbers.) (Expected return and risk) The following data represent returns for the common stocks over a one-year period. Probability Returns Google 0.1 -20% ATT -10% 0.2 8% 4% 0.2 29% 13% 0.3 -18% 20% 0.2 4% -6% The standard deviation of Google return is %. (Keep the sign and two decimal numbers.)