please help quick

Moss Company bought a plant asset that cost $135,000. The asset has a $10,000 salvage value and a useful life of 10 years. Calculate the following: A) Depreciable cost B) Depreciation expense for year 5 under declining balance method C) Accumulated depreciation at the end of year 7 under straight line depreciation D) Book value of this asset at the end of year 10 under either method