Answer:
1) 2,666
3) 4,400
Step-by-step explanation:
16,000 divided by 6 is 2,666
So for the first year, it is 2,666
22,600 - 16,000 is 6,600
6,600 divided by 3 is 2,200
2,200 is the increasing number every year
In 7th year it will be 16,000+2200 = 18,200
In 4th year it will be 16,000-2200 = 13,800
Difference = 18,200-13,800 = 4,400.