A company issued bonds to fund the development of a new line of bottled beverages to be sold in grocery stores. The bonds have a face value of $$715,000$ and are selling at a premium for $$797,531.$ The bonds pay interest semiannually. They have a yield to maturity of $9\mathrm{.}00\%$ and four years until they mature.

What is the coupon rate on these bonds?