Year 1 Jan. 5 Purchased for $15,600 cash a new machine with an estimated useful life of four years and a salvage value of $3,600. Dec. 31 Recorded depreciation on the machine for the year. Year 2 May 1 Installed a set of attachments for the machine at a cost of $800 cash. The attachments are expected to increase the productivity of the machine over its remaining useful life, but will not increase the salvage value of the machine. Dec. 31 Recorded depreciation on the machine for the year. Year 3 Dec. 31 Recorded depreciation on the machine for the year. Basin's depreciation policies include: (1) using straight-line depreciation, (2) recording depreciation to the nearest whole month, (3) expenditures for betterments that enhance the productivity of an asset are added directly to the asset account Required: Note: Round to the nearest dollar. Input your answer without any "\$" or ",". For example, if the answer is $5,600.03, enter 5600 . If the answer is $73,548.70, enter 73549. Based on these transactions: a. Depreciation expense for each of the three years: Year 1=\$ Year 2= $ Year 3=$ b. Book value of the delivery machine at the end of year 3=$