- Question 8 1 point Number Help A stock had returns of 12 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 - Question 9 1 point Number Help 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 0.3 0.8 Medium 0.4 0.1 Bad ? -0.2 Number