On the issue date, you bought a $25-$year maturity, $8\%$ semi$-$annual coupon bond. The bond then sold at YTM of $7\mathrm{.}5\%.$ Now, $7$ years later, the similar bond sells at YTM of $6\mathrm{.}75\%.$ If you hold the bond now, what is your realized rate of return for the $7-$year holding period?