A36m long wave pool at an amusement park sends out a 2.5 metre high wave every minute (height measured from crest to trough) at rest the level of water in the pool is 1.5 metres. it takes 2 seconds for the machine to form the trough of the wave and 5 seconds later the crest is formed. the wave travels at a rate of 2 metres per second. sketch 2 full cycles of the wave including all times of key points.