The last four years of returns for a stock are as shown? here: Year 1 2 3 4 Return -3

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The last four years of returns for a stock are as shown? here:

Year 1 2 3 4

Return -3.8% 27.6% 12.4% 4.5%

.

a. What is the average annual? return?

b. What is the variance of the? stock's returns?

c. What is the standard deviation of the? stock's returns?

Note?: Notice that the average return and standard deviation must be entered in percentage format. The variance must be entered in decimal format.