c8 q4 please help with all 5 parts

Historical returns. Calculate the arithmetic average return of U.S. Treasury bills, long-term government bonds, and large-company stocks for 1988 to 1997 . Which had the highest return? Which had the lowest return? Click on "Get more help" menu, then select "Spreadsheet" to see Table 8.1-Year-by-Year Returns, 1950-1999. What is the average return of U.S. Treasury bills for 1988 to 1997? \% (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 1988 to 1997 . Which had the highest return? Which had the lowest return? Click on "Get more help" menu, then select "Spreadsheet" to see Table 8.1-Year-by-Year Returns, 1950-1999. What is the average return of U.S. Treasury bills for 1988 to 1997? \% (Round to two decimal places.)