For the data in the file sandp.xlsx, the mode of the monthly returns (rounded to the nearest one tenth of a percent) is -0.5% 0.0% 0.2% 0.4% None of the above Month 1881.02 1881.03 1881.04 1881.05 1881.06 Returns -0.32% 1.13% -0.32% 4.50% 1.23% -3.50% -2.36% 0.81% -1.60% 1881.07 1881.08 1881.09 1881.10 :NCONe