For the cash flows shown, determine the incremental cash flow between machines B and A for (a) year O, (b) in year 3, and (c) in year 6. Machine A B First Cost, $ -15,000 -25,000 AOC, $/year -1,600 -400 Salvage value, $ 3,000 6,000 Life, years 3 4 (a) = -10000 (b) = 13200 (c) = 13200 (a) = -10000 (b) = 13200 (c) = 4200 (a) = -10000 (b) = 13200 (c) =6000 (a) = -10000 (b)=-1800 (c) = 1200