You are considering the ABC Bond position you have, it has a $9\mathrm{.}0\%$ coupon rate $(m=2).$

You bought the bond, at a Quoted price of $74\mathrm{.}5(74\mathrm{.}5\%$ of PAR$),5$ years ago, when it had

$25$ years to maturity. Today you are thinking of selling the bond. You know the risk

premium on the ABC bond has improved from good financial outcomes and today is

$3\mathrm{.}45\%.$ If the risk free rates remain unchanged, given the information available, what is

the realized return on your investment in the ABC Bond?

Could you solve this with excel rather than "mathematically"?