can you please answer the following for me? Thank youu in advance

A stock had returns of 6 percent, 24 percent, and -6 percent over the past 3 years. What is the mean of the stock's returns over the past 3 years minus the sample standard deviation of the stock's returns from the past 3 years? Answer as a rate in decimal format so that 12.34% would be entered as 1234 and 0.98% would be entered as .0098. Number What is the expected standard deviation of stock A's returns based on the information presented in the table? Answer as a rate in decimal format so that 12.34% would be entered as 1234 and 0.98% would be entered as .0098. Note that figures in the table are presented in decimal format, not as percentages. outcome Probability of outcome Stock A return in outcome Good 0.2 0.6 Medium 0.5 0.2 Bad ? -0.4 Number