4. Historical returns. Calculate the arithmetic average return of U.S. Treasuny bilk, long-term government bonds, and large-company stocks for 1986 to 1995 . Which had the highest return?' Wilihich had the lowest return?" Click on "Get more help" menu, then select "Spreadsheet" to see Table 8.1-Year-by-Year Returns, 1950-1999. Wilihat is the average return of U.S. Treasury bilk for 1986 to 1995 ? (Round to two decimal places.) Wiliat is the average return of long-term government bonds for 1986 to 1995 ? (Round to two decimal places.) Whit at is the average return of Iarge-company stocks for 1986 to 1995 ? o (Round to two decimal places.) Wilich imuestment had the highestaverage return for 1986 to 1995 ? (Select the best response.) A. U.S. Treasury bills B. Large-company stods C. Long-term government bond Wihich imestment had the lowest average return for 1986 to 1995 ? (Select the best response.) A. Largecompany stods B. U.S. Treasury bills C. Long-term government bond