1. According to the Unbiased Expectation Theory, the first year's one year interest rate is R 1=1.94%, and the expected one year rates for the following years are as follows, respectively. El 21 1)=3%, El 31 1)=3.74% and El 4T 1)=4.4%. The four year interest rate (given they are all default-risk free treasury securities), the four-year T Security interest rate is (annually) R =?% 4.256 4,0667 4.1650 0 0 0 0 0 0 4.0723 4.1866 4.123 4.0981 4.100