please explain how to do it

Giants Inc. has issued two types of debt on January 1, 2021, the start of the company's fiscal year (Jan.1-Dec. 31) 1. $30 Million par of 10 year, zero-coupon bonds at a price to yield 12% per year. 2. $15 million, 10-year, 10% unsecured bonds, interest payable semi-annually to yield 12%, on July 1, and on January 1. 2. Prepare Journal entries for both bonds for 2021, 2022, and 2023 using Effective Interest and Straight Line Methods of amortization