Which of the methods below is a way to allocate depreciation?

The allocation each year is the amount of cost as determined by the actual estimated usage for that year.

Use the government-mandated accelerated depreciation system, which depreciates the capital asset at the minimum accelerated amount allowed each year.

Use the government-mandated accelerated depreciation system, which depreciates the capital asset at the maximum accelerated amount allowed each year.

The allocation each year is the same amount of cost as determined by the average expected operating cash inflow divided by the number of years of useful life of the machines.