For the cash flows shown, determine the incremental cash flow between machines B and A $($a$)$ in year $0,($b$)$ in year $3,$ and $($c$)$ in year $6.$

Machine A B

First Cost, $ $-17,00025,000$

AOC, $ per Year $-1,800400$

Salvage Value, $ $5,0006,000$

Life, Years $36$