During 2014, Matsumura Corporation spent ¥170,000 in research costs. As a result, a new product called the New Age Piano was patented. The patent was obtained on October 1, 2014, and had a legal life of 20 years and a useful life of 10 years. Legal costs of ¥24,000 related to the patent were incurred as of October 1, 2014. (Amounts are in thousands.) Instructions 1. (a) Prepare all journal entries required in 2014 and 2015 as a result of the transactions above. 2. (b) On June 1, 2014, Matsumura spent ¥12,400 to successfully prosecute a patent infringement suit. As a result, the estimate of useful life was extended to 12 years from June 1, 2014. Prepare all journal entries required in 2014 and 2015. 3. (c) In 2016, Matsumura determined that a competitor's product would make the New Age Piano obsolete and the patent worthless by December 31, 2017. Prepare all journal entries required in 2016 and 2017.