Chattanooga Company purchased a depreciable asset for $80,000 on January 1, 2015. The estimated salvage value is $20,000, and the estimated useful life is 5 years. The straight-line method is used for depreciation. On January 1, 2017, the company made a capital expenditure of $16,000 for an addition to the asset. What is depreciation expense for 2017?(a)$12,000.(b)$14,400.(c)$24,000.(d)$25,333.