Answer:
There wasn't really a question here but for both the answers is
for year 2 we got 12 sales
for year 3 we got 18 sales
Explanation:
since the first year Mr.Jackson sold 3 computer monitors then in the second year he must've multiplied the times he had sold it which means 4 x 3 which equals 12
as well as the third year, on the third year he sold 6 times the first year so it means 6 x 3 which equals 18