Five years ago, Silver$-$and$-$Gold Corp. $($SnG$)$ issued bonds to its investors. The bonds sold

at par value and had a time$-$to$-$maturity of $7$ years. The bonds make semi$-$annual coupon

payments, have a coupon rate of $15\%,$ and have a face value of $$1,000.$

$13.$ What was the yield$-$to$-$maturity $($APR$,$ semi$-$annually compounded$)$ of SnG bonds at

issuance $($i$.$e$.,$ five years ago$)?$

a$.7\mathrm{.}5\%$

b$.10\mathrm{.}0\%$

c$.15\mathrm{.}0\%$

d$.15\mathrm{.}6\%$

e$.$ Unable to solve; the bond$$s price is not given.