Answer:
a 4 by 4 square
a 5 by 5 square
Explanation:
The three shapes are
1) a square 1 unit by 1 unit
2) a square 2 units by 2 units
3) a square 3 units by 3 units
The next two shapes are
4) a square 4 units by 4 units
5) a square 5 units by 5 units