In a small group of students, locate Accounting Principles Board Opinion No. 21 (from a faculty member or from the library) relating to the amortization of premiums and discounts on bonds. Investigate why the Board recommended the effective interest rate method over the straight-line method for amortizing bond premiums and discounts. Which method do you favor and why? Summarize the highlights of the APB Opinion and your own opinions in a written report to your instructor.