please show your work and do it on excel

On May 1, 2016 LeMay Company purchased a new machine for $42,000. The new machine has an estimated useful life of ten years and the salvage value was estimated to be $6,000. Instructions: Compute depreciation for 2016, 2017 and 2018 and the book value of the machine at December 31, 2018, (a)assuming the sum-of-the-years'-digits method is used. (b) double declining balance