Answer:
7.4%
Step-by-step explanation:
Coupon rate=coupon payment/face value
The coupon payment can be ascertained using the pmt Excel function as stated below:
=pmt(rate,nper,-pv,fv)
rate is the yield to maturity expressed in semiannual terms i.e 6.9%*6/12=3.45%
nper is the number of semiannual coupons the bond would pay over its 22.5 years i.e 22.5*2=45 payments
pv is the current price of $1057
fv is the face value of $1000
=pmt(3.45%,45,-1057,1000)=$37(semiannual coupon)
annual coupon=$37*2=$74
coupon rate=$74/$1000=7.4%