Solve the following. 

Table 9.2 Average Returns for Bonds 1950 to 1959 1960 to 1969 1970 to 1979 1980 to 1989 1990 to 1999 2000 to 2009 1950 to 1959 1960 to 1969 1970 to 1979 1980 to 1989 1990 to 1999 2000 to 2009 Table 9.4 Annual Standard Deviation for Bonds Decade Average Average Average Average Average Average 1960s 1970 1980s 1990s 2000s Long-Term Treasury Bonds Cov 0.00 1.5 5.4 13.4 Long-Term Treasury Bonds 4.61 6.1 6.7 Use the tables above to calculate the coefficient of variation of the risk-return relationship of the bond market during each decade since 1950. (Round your answers to 2 decimal places.) 9.6 8.8 15.9 12.6 10.7