Question 4 (1 point) Suppose a firm purchased an asset for $100,000 and estimated on the date of the purchase, its useful life as 10 years with no residual value. The firm uses straight-line depreciation. After using the asset for 5 years, the firm changes its estimate of the remaining useful life to 4 years (a total of 9 years rather than the original 10 years). How much depreciation expense will the firm recognize in the sixth year of the asset's life? a. $12,500 b. 510,000 c. 511,111 d. $31,111