A stock had annual stock returns of negative 10.510.5%, 12.312.3%, and 2222% during the past three years. What was the standard deviation of this stock's annual returns during this period? (Hint: Use the formula for standard deviation using historical analysis we covered in class:

Step 1: Find the stock's expected return (E(k)) using historical analysis, which equals the arithmetic average of past returns.

Step 2: Subtract E(k) from each annual return one by one, find the square of the difference, sum up squared differences.

Step 3: Divide the sum by n-1, where n i the number of historical returns.

Step 4: Take the square root to find the standard deviation of returns.)

A stock had annual stock returns of-22.8%, 1 1.5%, and 28.4% during the past three years. What was the standard deviation of this stock's annual returns during this period? n-1 [N-E(k 2 (Hint: Use the formula for standard deviation using historical analysis we covered in class. = Step 1: Find the stock's expected return (E(k)) using historical analysis, which equals the arithmetic average of past returns. Step 2: Subtract E(k) from each annual return one by one, find the square of the difference, sum up squared differences Step 3: Divide the sum by n-1, where n i the number of historical returns Step 4: Take the square root to find the standard deviation of retums.) The standard deviation is %. (Answer in percentage, round to one decimal place.)