Historical returns Calculate the arithmetic average return of U.S. Treasury bills, long-term government bonds, and large company stocks for 1987 to 1996. Which had the highest return? Which had the lowest return? On the left side, click on the Spreadsheet Learning Aid to see Table 8.1-Year-by-Year Returns, 1950-1999 What is the average return of U.S. Treasury bills for 1987 to 19967 % (Round to two decimal places.) Historical returns Calculate the arithmetic average return of U.S. Treasury bills, long-term government bonds, and large company stocks for 1987 to 1996. Which had the highest return? Which had the lowest return? On the left side, click on the Spreadsheet Learning Aid to see Table 8.1-Year-by-Year Returns, 1950-1999 What is the average return of U.S. Treasury bills for 1987 to 19967 % (Round to two decimal places.)