Two canoes are 15 m apart on a lake. Each bobs up and down with a period of 6.0 seconds. When one canoe is at its highest point, the other canoe is at its lowest point. Both canoes are always within a single cycle of the waves. Determine the speed of the waves. 2.5 m/s

5.0 m/s

14 m/s

40 m/s

80 m/s