The Brown Company purchased a machine on January 1 for $1 million. The machine has an estimated useful life of 3 years, during which time it is expected to produce 6 million units. Residual value is estimated at $100,000. The machine actually produced 1 million, 2 million, and 3 million units for Years 1, 2, and 3, respectively. Calculate depreciation expense for the machine for all three years using the following methods.

a. Straight-line

b. Double declining balance (round rate to whole %)

c. Units of output (round rate to 2 decimal places)

d. If management decided to change the asset's life to 7 years rather than 3 years, what effect would this have on net income in Year 1?