here is my question, please help.

Cullumber Company purchased equipment on March 31, 2021, at a cost of $328,000. Management is considering the merits of using the diminishing-balance or units-of-production method of depreciation instead of the straight-line method, which it currently uses for other equipment. The new equipment has an estimated residual value of $8,000 and an estimated useful life of either four years or 80,000 units. Demand for the products produced by the equipment is sporadic so the equipment will be used more in some years than in others. Assume the equipment produces the following number of units each year: 14,600 units in 2021; 20,400 units in 2022; 20,000 units in 2023; 20,000 units in 2024; and 5,000 units in 2025. Cullumber has a December 31 year end. Prepare separate depreciation schedules for the life of the equipment using: (Round depreciation per unit to 2 decimal places, e.g. 5.28 and final answers to 0 decimal places, e.g. 5,275.) Double-diminishing-balance method: Units-of-production method: (b) Your answer is correct. Compare the total depreciation expense and accumulated depreciation under each of the three methods over the life of the equipment. (Round answers to 0 decimal places, e.g. 5,275.) Contrast the effects of the three depreciation methods on (1) depreciation expense, (2) net income, (3) accumulated depreciation, and (4) carrying amount in each of the following: (a) the early years of an asset's life, and (b) over the total life of the asset. (1) (2) Depreciation Expense Net Income (a) Early years Straight-line Units-of-production Diminishing-balance (b) Total life Straight-line, units- of-production, diminishing-balance (3) (4) Accumulated Depreciation Carrying Amount