pls help me correct the wrong answers and show me how, thanks

E7-8 (Algo) Computing Depreciation under Alternative Methods LO7-3 Homy lce Cream Compary bought a new ice cream maker at the beginning of the year at a cost of $9,000. The estimated useful life was four years, and the residual value was $600. Assume that the estimated productive life of the machine was 12,000 hours. Actual annual usage was 4,200 hours in year 1; 3,900 hours in year 2;2,900 hours in year 3; and 1,000 hours in year 4. Required: -a. Complete a separate depreciation schedule by using Straight-line method. (Round your answers to the nearest dollar amount. Make sure that the carrying amount at the end of year 4 is equal to the residual value. Depreciation expense for the last period thould be calculated as Carrying value of 3rd year minus residual value.) Anewer is rnmaleta hut nat entirele carrart. b. Complete a separate depreciation schedule by using Units-of-production method. (Round your answers to the nearest dollar amount. Make sure that the carrying amount at the end of year 4 is equal to the residual value. Depreciation expense for the last. heriod should be calculated as Carrying vatue of 3rd year minus residuat value) 1-b. Complete a separate depreciation schedule by using Units-of-production method. (Round your answers to the nearest dollar amount. Make sure that the carrying amount at the end of year 4 is equal to the residual value. Depreciation expense for the last period should be calculated as Carrying value of 3rd year minus residual value.) -c. Complete a separate depreciation schedule by using Double-declining-balance method. (Round your answers to the nearest dollar amount. Make sure that the carrying amount at the end of year 4 is equal to the residual value. Depreciation expense for the last period should be calculated as Carrying value of 3rd year minus residual value.) Answer is complete but not entirely correct. This part of the question is not part of your Connect assignment