$11-$ 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 $ $51$ G $($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 computers$-$one environmental and one personal. What