ABC corp acquired a van on January 1, 2016 for $330,000. The company used the sum or years digits method assuming a 4-year useful life and a $10,000 residual value. During 2018 the company decides to change to straight-line depreciation and determines that the useful life of the truck is 6 years (no change to residual value).

a) what depreciation expense should ABC corp recognize in 2018?

b)how will these changes affect net income in 2018 assuming ABC corp pays a 20% tax rate?