I need the answer for this question please.

The following is the closing prices of S&P 500 for 13 months around year 2017: Date S&P 500 closing price $ 2,278.87 1/1/2017 2/1/2017 $ 2,363.64 3/1/2017 $ 2,362.72 4/1/2017 $ 2,384.20 5/1/2017 $ 2,411.80 6/1/2017 $ 2,423.41 NO 7/1/2017 $ 2,470.30 8/1/2017 $ 2,471.65 9/1/2017 $ 2,519.36 10/1/2017 $ 2,575.26 11/1/2017 $ 2,584.84 12/1/2017 $ 2,673.61 1/1/2018 $ 2,823.81 What is the geometric average of S&P monthly returns during 2017