What is the yearly depreciation expense under the straight-line method?

Perfect Pastries buys a display case for her bakery business on January 1, 2019. The case cost $36,000 and is expected to be used for ten years. At the end of the ten years it is expected that the case can be sold for $4,000.

Compute the depreciation expense for the third year (2021) using both straight-line and double-declining-balance depreciation methods.