Suppose we observe the following rates: $1$R$1=3\mathrm{.}2\%,1$R$2=5\mathrm{.}5\%.$ If the unbiased expectations theory of the term structure of interest rates holds, what is the one$-$year interest rate expected one year from now, E$(2$r$1)?$

Expected one$-$year interest rate $\%$