Please solve this problem like the example below. Thanks

Mary received the following annual returns from her investment: Year 1 6.4% Year 2 -4.5% Year 3 18.4% Year 4 8.8% Calculate the Variance of returns. Round the answer to two decimals places. Your Answer: Mary received the following annual returns from her investment: Year 1 9.6% Year 2 -4.0% Year 3 12.8% Year 4 11.8% Calculate the Variance of returns. Round the answer to two decimals places. Your Answer: Answer Hide Check my answer Step 1: Calculate arithmetic average: (9.6% -4.0%+12.8%+11.8%) / 4 = 7.55% Step 2 Calculate variance: [(9.6% -7.55%)^2+(-4.0% -7.55%)^2+(12.8% -7.55%)^2+(11.8% -7.55%)^2]/3 = 61.08