a machine can be purchased for $150,000 and used for five years, yielding the following net incomes. in projecting net incomes, double-declining depreciation is applied, using a five-year life and a zero salvage value. year 1 year 2 year 3 year 4 year 5 net income $ 10,000 $ 25,000 $ 50,000 $ 37,500 $ 100,000