Revise your worksheet to reflect these updated assumptions and then answer the questions that follow. Original Cost Estimated Residual Value $141,600 35,400 Estimated Useful Years 6 Estimated Units 48,000 Actual Units: Year 1 4,800 8,640 10,560 11,520 9,600 Year 2 Year 3 Year 4 Year 5 Year 6 7,680 52,800 Required: 1. Use your spreadsheet to recalculate Depreciation Expense, Accumulated Depreciation, and the Book Value for Year 6 under each method. Note your revised values below. Double-Declining- Activity-Based Straight-Line Balance Depreciation Expense Accumulated Depreciation Book Value 2. Prepare the journal entry to record depreciation in Year 6 for each of the methods. (If no entry is required for a transaction/event, select "No Journal Entry Required" in the first account field.) Record the Depreciation Expense for the period under the straight-line method ww Record the Depreciation Expense for the period under the double-declining- balance method. Record the Depreciation Expense for the period under the activity-based method