*please answer in excel with formula. Thank you in advance*

/P11-8 Book value and taxes on sale of assets Troy Industries purchased a new machine 3 years ago for $80,000. It is being depreciated under MACRS with a 5-year recovery period. Assume a 21% tax rate. a. Use Table 4.2 to calculate the book value of the machine. b. Calculate the firm's tax liability if it sold the machine for each of the following amounts: $100,000; $56,000; $23,200; and $15,000