During 2021, Riverbed Corporationspent $162,720 in research and development costs, As a result, a new product called the New Age Piano was patented. The patent was obtained on October 1, 2021, and hod a legal life of 20 years and a useful life of 10 years, Legal costs of $36,720 related to the patent were incurred as of October 1,2021 (a) Prepare all journal entries required in 2021 and 2022 as a result of the transactions above. fCredit account titles are outomatically indented when amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the occount titles and enter Ofor the amounts. List all debit entries before credit entries. Aecord entries in the order digplayed in the problem statement) (To record research and development expenses) 2021 Patents Cash (To record legal expenses) (To record amortization expense) 918 On June 1,2023, Riverbed spent $8,280 to successfully prosecute a patent infringement suit. As a result, the estimate of useful life was extended to 12 years from June 1, 2023. Prepare all journal entries required in 2023 and 2024. (Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter O for the amounts. List all debit entries before credit entries. Record entries in the order displayed in the problem statement.)