Answer:
A. 22.43 years
Explanation:
The financial calculator can be used to determine the number of years to maturity as follows:
PMT=31 (semiannual coupon=$1,000*6.2%*6/12=$31)
I/Y=4.23% (semiannual yield to maturity=8.46%*6/12=4.23% )
PV=-774.50 (current market price=$774.50)
FV=1000 (face value of $1000)
lastly enter N=44.8643664
Note that 44.8643664 is stated in terms of semiannual periods
Years=44.8643664 *6/12= 22.43 years