You have been given the following return data, ; on three assets - A, B, and C-over the period 2021-2024. Using these assets, you have isolated three investment altematives: a. Calculate the average portfolio return for each of the three alternatives. b. Calculate the standard deviation of retums for each of the three alternatives. c. On the basis of your findings in parts a and b, which of the three investment altematives would you recommend? Why? a. Calculate the portfolio retum over the 4 -year period for each of the 3 altematives. Atternative 1: \% (Round to two decimal places.) Data table (Click on the icon here in order to copy its contents of the data table below into a spreadsheet.) Data table (Click on the icon here in order to copy its contents of the data table below into a spreadsheet.)