On January 1, 2016, Lamb Services issued $200,000, 9%, four-year bonds. Interest is paid semiannually on June 30 and December 31. The bonds were issued at $193,537 when the market rate was 10%.

Required:

1. Prepare an amortization schedule that determines interest at the effective interest rate.

2. Prepare an amortization schedule by the straight-line method.

3. Prepare the journal entries to record interest expense on June 30, 2018, by each of the two approaches.