During 2017, Adams Corporation spent $550,000 in research and development costs. As a result, a new product called Hoopitup3000 was patented. The patent was obtained on July 1, 2017 and had a legal life of 20 years and useful life of 10 years. Legal costs of $140,000 related to the patent were incurred as of July 1, 2017 Instructions: (a.) Prepare journal entries required for 2017 and 2018. (Hint: 4 entries are needed) On October 1, 2019, Adams spent $120,000 to successfully defend a patent infringement case against their product. As a result, the estimate of useful life was extended to 15 years from October 1, 2019 (b.) Prepare all journal entries required for 2019. (Hint: 3 entries are needed) On April 15, 2020, Adams determined that a competitor's product would make the new Hoopitup 3000 obsolete and the patent worthless by December 2021. (c.) Prepare all journal entries required for 2020. (Hint: 1 entry is needed)