AUD Co. has a Dec 31, 2020 year end and a 20% tax rate. Later in 2020 it was discovered that a patent purchased on October 1, 2018 for $30,000 had been expensed. The patent was expected to have a useful life of 10 years with no residual value. Indicate the change to retained earnings amounts, if any for each year 2018 2019 Retained earnings change (+/- 5) For each of the independent situations below: i) Indicate the nature of the accounting change or correction by placing an "X" in the best selection. Choose the best ONE only for each. State any assumptions needed. ii) Indicate the appropriate treatment of the item. 0 Change in Change in Change due accounting accounting to correction of ESTIMATE POLICY an ERROR (prospective treatment TREATMENT (PROspective RETROspective) Assumption Of needed) a) Change due to debiting a new asset to an expense account b) Change due to failure to recognize and accrue revenue. c) Change from straight-line to double declining-balance method of depreciation as the type of tangible assets owned has changed and this better reflects the use d) Change in amortization period for an intangible asset based on new information about useful life. Ak another auction while you wait