According to the unbiased expectations hypothesis, what does the market expect the 2-year Treasury rate to be six years from today, E(6r2)?

the wall street journal reports that the rate on 6-year treasury

According to the unbiased expectations hypothesis, the market expects the 2-year Treasury rate six years from today, E(6r2), to equal the average of current and future expected rates. Therefore, if it is assumed that the current 2-year Treasury rate is 1%, and the expected rate 6 years from now is 5%, then E(6r2) would be (1% + 5%)/2 = 3%.