Answer:
7.82%
Step-by-step explanation:
In this question, we use the Rate formula which is shown in the spreadsheet.
The NPER represents the time period.
Given that,
Present value = $1,131
Future value or Face value = $1,000
PMT = 1,000 × 9.1% ÷ 2 = $45.5
NPER = 21 years × 2 = 42 years
The formula is shown below:
= Rate(NPER;PMT;-PV;FV;type)
The present value come in negative
So, after solving this, the coupon rate would be 7.82%