solve this please

Problem 4 a) straight-line method of depreciation Cost Book Value Depreciation Expense $40,000 Accumolited Depreciation $72,000 2020 $400,000 $328,000 2021 units-of-activity method of depreciation assuming 16,000 units of product are produced in 2020 and 24,000 units are produced in 2021 Cost Depreciation Expense Accumulated Depreciation Book Value 2020 2021 double-declining-balance method of depreciation Depreciation Expense Cost Accumulated Depreciation Book Value 2020 2021 Problem 4 a) straight-line method of depreciation Cost Book Value Depreciation Expense $40,000 Accumolited Depreciation $72,000 2020 $400,000 $328,000 2021 units-of-activity method of depreciation assuming 16,000 units of product are produced in 2020 and 24,000 units are produced in 2021 Cost Depreciation Expense Accumulated Depreciation Book Value 2020 2021 double-declining-balance method of depreciation Depreciation Expense Cost Accumulated Depreciation Book Value 2020 2021