A gas-powered electric generator is purchased by a public utility as part of an expansion program. It is expected to be useful, with proper maintenance, for an estimated 30 years. The cost is s 15.5 million, installed. The salvage value at the end of 30 years is expected to be 10.5% of the original cost. a. What is the MACRS-GDS property class? b. Determine the depreciation deduction (d) and the unrecovered investment (B) for years 1, 5, and the last depreciable year of the generator. last year = $ Blast year = $