Keen Company acquired patent nights on January 10 of Year 1 for $480,000, The patent has a useful life equal to its legal life of eight years, On January 7 of Year 4 , Kieen successfully defended the patent in a lawsuit at a cost of $24,000. If required, round your answers to the nearest dollar. a. Determine the patent amortiration expense for Year 4 ended December 31 . b. Journalize the adjusting entry on December 31 of Year 4 to recognize the amortization. If an amount box does not require an entry, leave it blank