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

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

$12\mathrm{.}37$

$23\mathrm{.}33$

$34\mathrm{.}42$

$45\mathrm{.}88$

An investor buys a $5\mathrm{.}17\%$ coupon $4$ year annual$-$pay risk$-$free bond and holds it to maturity. Assuming that one year forward rates become realized as future spot rates, what is the expected annualized rate of return to the investor?

Enter answer in percents. Please include excel formulas and answer