Data table (Click on the icon here in order to copy its contents of the data table below into a spreadsheet.) (Click on the icon here in order to copy its contents of the data table below into a spreadsheet.) a. Calculate the average portfolis rehum for each of the three alternatives. b. Calculale the standard deviation of retums for each of the three ollemasives. c. On the basis of your findings in parts a and b, which of the throe investment atematives would you recommend? Why