please answer the (b) part with explanation.

Cullumber Company purchased equipment on March 31,2021, at a cost of $248,000. 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 currentiy 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: 20,000 units in 2022 . 20,400 units in 2023, 20,000 units in 2024; and 5,000 units in 2025. Cullumber has a December 31 year end. (a) Prepare separate depreciation schedules for the life of the equipment using: (Round depreciation per unit to 2 decimal places, eg. 5.28 and final answers to 0 decimal places, eg,5,275.) Prepare separate depreciation schedules for the life of the equipment using; \{Round depreciotion per unit to 2 decimal ploces, eg 5.28 and final answers to 0 decimal places, es. 5,275. Straight-line method: Double-diminishing-balance method: Units-of-production method: -. Your answer is partially 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 placis, e.g. 5, 275.)