I need help with the last parts, please.

Book value and taxes on sale of assets Troy Industries purchased a new machine 4 year(s) ago for $76,000. It is being depreciated under MACRS with a 5 -year recovery period using the schedule Assume 21% ordinary and capital gains tax rates. a. What is the book value of the machine? b. Calculate the firm's tax liability if it sold the machine for each of the following amounts: $91,200;$53,200;$12,920; and $9,000. a. The remaining book value is $ (Round to the nearest dollar.) b. Calculate the firm's tax liability for each case: (Round to the nearest dollar.) Data table (Click on the icon here in order to copy the contents of the data table below into a spreadsheet.) Rounded Depreciation Percentages by Recovery Year Using MACRS for First Four Property Classes *These percentages have been rounded to the nearest whole percent to simplify calculations while retaining realism. To calculate the actual depreciation for tax purposes, be sure to apply the actual unrounded percentages or directly apply double-declining balance (200\%) depreciation using the half-year convention