Describe how the annual payment bond valuation formula is changed to evaluate semiannual coupon bonds, and write out the revised formula.

Describe how the annual payment bond valuation formula is changed
to evaluate semiannual coupon bonds, and write out the revised formula.

Hartwell Corporation bonds have a 20-year maturity, an 8 percent
semiannual coupon, and a face value of $1,000. The going interest
rate (r d) is 7 percent, based on semiannual compounding. What is
the bond’s price?