Just answer (a) (b) and (e)

11-51 A computer costs $3500 and its salvage value in 5 years is negligible. What is the book value after 3 years? If the machine is sold for $1500 in Year 5, how much gain or recaptured depreciation is there? Assume (a) Straight-line depreciation (b) Double declining balance depreciation (c) 20% bonus depreciation with the balance using 5-year MACRS (d) MACRS depreciation (e) There are two important considerations when disposing of old computersone environmental and one personal. What are they, and how can you lessen the effect of each