Score: 0 of 1 pt 30f 8 (5 complete) HW Score: 31.25%, 2.5 of 8 pts P8-12 (similar to) Question Help * Variance and standard deviation. Calculate the variance and the standard deviation of U.S. Treasury bills, long-term govenment bonds, and small-company stocks for 1950 to 1959, 1960 to 1969, 1970 to 1979and 1 1980 to 1989 from Table 8.1. Which had the highest variance? Which had the lowest variance? Click on the Spreadsheet Learning Aid to see Table 8.1-Year-by-Year Returns, 1950-1999 Hrt Make sure to round all intermedate ca alations to at least seven dear al laces. The input instructions, phrases in parenthesis after each an er box only a y for the answers you will type What is the variance of U.S. Treasury bills for 1950 to 1959. 1960 to 1969, 1970 to 1979, and 1980 to 19897 The variance of US Treasury bastor 1950 to 1959 is(Round to five decrnal places.)