# Table 1 Heights of the four obstacles.

Obstacle Height (mm)
Base board 3.4 ($$1.6 + 1.8$$)
1 Brick 13.0 ($$1.6 + 1.8 + 1 \times 9.6$$)
2 Bricks 22.6 ($$1.6 + 1.8 + 2 \times 9.6$$)
3 Bricks 32.2 ($$1.6 + 1.8 + 3 \times 9.6$$)
1. The studs on the bricks and the base board had a height of 1.8 mm, the plane part of the base board had a height of 1.6 mm. The bricks without the studs had a height of 9.6 mm.