the following table lists the annual spot rates for the next $4$ years:

Time $($years$)$ Rate $(\%)$

$12\mathrm{.}56$

$23\mathrm{.}09$

$34\mathrm{.}07$

$45\mathrm{.}74$

Under these conditions, what would be the yield to maturity on a $2$ year risk free bond paying a $3\mathrm{.}43\%$ annual$-$payment coupon?

Enter answer in percents.