Calculate the arithmetic average return of U.S. Treasurybills, long-term governmentbonds, andlarge-company stocks for 1950 to1959, 1960 to1969, 1970 to1979, and 1980 to 1989. Which had the highestreturn? Which had the lowestreturn? On the leftside, click on the Spreadsheet Learning Aid to see Table 8.1long dash

Year-by-Year Returns, 1950-1999.

What is the average return of U.S. Treasury bills for 1950 to1959, 1960 to1969, 1970 to1979, and 1980 to1989?

The average return of U.S. Treasury bills from 1950 to 1959 is

nothing

%. (Round to two decimalplaces.)

Please can I get some help?!?!