Based on economists' forecasts and analysis, one$-$year Treasury bill rates and liquidity premiums for the next four years are expected

to be as follows:

${?}_1{R}_1=5\mathrm{.}65\%$

$E{(}_2{r}_1)=6\mathrm{.}75\%L_2=0\mathrm{.}05\%$

$E(r_1)=6\mathrm{.}85\%L_3=0\mathrm{.}10\%$

$E{(}_4{r}_1)=7\mathrm{.}15\%L_4=0\mathrm{.}12\%$

Calculate the yield to maturity for four years.

Note: Round your percentage answers to $2$ decimal places $($e$.$g$.,32\mathrm{.}16).$