Computing Partial Period Depreciation under Multiple Depreciation Methods Cruz Company purchased a computer on June 30, 2020, for $37,800. The computer had a salvage value of $10,800 and useful life of six years. Note: In answering the following questions, do not round until your final answer. Round your final answer to the nearest whole dollar. a. Using the declining-balance depreciation method (200%), determine depreciation expense for 2021. $ b. Using the declining-balance depreciation method (150%), determine depreciation expense for 2021. $ c. Using the straight-line depreciation method, determine depreciation expense for 2021