Question 15 (5 points) The vertical location of the tip of a clock's second hand (y) relative to the clock's center measured in centimetres is modelled by the equation y= 3cos[], where sis 3D the number of seconds that have passed. a) How long is the second hand, and where does it start? b) Use transformations to explain how you could change the original equation to find the vertical location of the tip of the hour and minute hands in terms of yand 5 if the hour hand is 1 centimetre long and the minute hand is 4 centimetres long. c) What is a simple way you could change the equations to represent the hands' horizontal positions? Why does this work? Paragraph Add a File Record Audio Record Video Question 16 (5 points) The height (h) of the water in metres at a certain point at the wave pool over a period of seconds is modelled by the equation M5) = sin25+ l sins+ 3. 2 2 a) How high is the water after 2 seconds? b) During the first 10 seconds, how many times does the wave height reach 3 metres? c) During the first 5 seconds, at what 3 points is the water level at 2 metres