Please, show all the steps and explanations

was estimated that the building will have a useful life of 40 years and a salvage value of $60,000 at the end of that time. would have a life of 30 years and a salvage value of $20,000. In 2027 , it is determined that the probable life of the building and addition will extend to the end of 2058 , or 20 years beyond the original estimate. Instructions a. Using the straight-line method, compute the annual depreciation that would have been charged from 1999 through 2008. b. Compute the annual depreciation that would have been charged from 2009 through 2026. c. Prepare the entry, if necessary, to adjust the account balances because of the revision of the estimated life in 2027. d. Compute the annual depreciation to be charged, beginning with 2027