An oceanographic research buoy measures its height above the seabed as waves pass. The maximum height recorded at the crest of a wave is 12.4 m, and the minimum height recorded at the trough is 8.8 m.
What is the amplitude of these waves?
1.8 m1.8\text{ m}1.8 m
3.6 m3.6\text{ m}3.6 m
10.6 m10.6\text{ m}10.6 m
8.8 m8.8\text{ m}8.8 m