Equipment with a cost of $332,700 has an estimated residual value of $38,300, has an estimated useful life of 32 years, and is depreciated by the straight-line method. a. Determine the amount of the annual depreciation. $ b. Determine the book value after 17 full years of use. $ c. Assuming that at the start of the year 18 the remaining life is estimated to be 20 years and the residual value is estimated to be $32,300, determine the depreciation expense for each of the remaining 20 years