Convert each of the following estimates of useful life to a straight-line depreciation rate, stated as a percentage, assuming that the residual value of the fixed asset is to be ignored: 2 years, 4 years, 10 years, 20 years, 25 years, 40 years, 50 years. A refrigerator used by a meat processor has a cost of $86,750, an estimated residual value of $7,500, and an estimated useful life of 25 years. What is the amount of the annual depreciation computed by the straight-line method