Revision of Depreciation Equipment with a cost of $379,700 has an estimated residual value of $40,700, has an estimated useful life of 15 years, and is depreciated by the straight-line method. a. Determine the amount of the annual depreciation. $ b. Determine the book value after 5 full years of use. $ c. Assuming that at the start of the year 6 the remaining life is estimated to be 14 years and the residual value is estimated to be $39,900, determine the depreciation expense for each of the remaining 14 years. $