Answer:
0-4: Make it 5 units tall
5-9: Make it 0 units tall (Change nothing)
10-14: Make it 3 units tall
15-19: Make it 4 units tall
20-24: Make it 3 units tall
Explanation:
0-4: 2, 2, 4, 4, 4 (5 numbers)
5-9: (0 numbers)
10-14: 10, 14, 14 (3 numbers)
15-19: 16, 16, 15, 19 (4 numbers)
20-24: 20, 20, 22 (3 numbers)