Computation of Effective Interest Rate On June 30, 2019, Gaston Corporation sold $750,000 of 9% face value bonds for $711,076.21. On December 31, 2019, Gaston sold $510,000 of this same bond issue for $536,935.92. The bonds were dated January 1, 2019, pay interest semiannually on each December 31 and June 30, and are due December 31, 2026. Required: Compute the effective yield rate on each issuance of Gaston's 9% bonds. Click here to access the tables to use with this problem. Round your answers to the nearest whole percentage. June 30, 2019 issuance: % % December 31, 2019 issuance