Over the past five years, your investment provided the following percentage returns: Year Annual Return 2016 8.975% 2017 5.260% 2018 2.380% 2019 -4.520% 2020 11.340% Calculate the following statistics: (1/1000 of one percent without % sign, e.g. 12.671, if a negative percentage, -9.56): 1) Arithmetic mean for annual returns 2) Standard deviation (sample): Assume that the frequency distribution of annual returns followed a normal distribution. What is the range that you would expect the annual returns to fall within 95% of the time? 3) Lower limit of annual return 4) Upper limit of annual return