Assume the current interest rate on a one-year Treasury bond (Ry) is 4.50 percent, the current rate on a two-year Treasury bond (Rz) is 5.25 percent, and the current rate on a three-year Treasury bond (R) is 6.50 percent. If the unbiased expectations theory of the term structure of interest rates is correct, what is the one-year interest rate expected on Treasury bills during year 3 (E(3rt) or 3/1)? (LG 2-8)