Answer:
Yield to maturity is 7.93%
Yield to call is 7.83%
Explanation:
I calculated both the yield to maturity and yield to call using the rate formula in excel which is =rate(nper,pmt,pv,-fv)
nper is the year to maturity and year to call of 18 years and 8 years respectively.
pmt is the periodic coupon payment is 9%*1000=$90 in each case.
pv is the present value in each case of $1100.35
The future value which is the redemption value is $1000 for yield to maturity and $1060 for yield to call
Find attached detailed calculation