[15 Marks total] Application 8) A boat tied up at a dock bobs up and down with passing waves. The vertical distance between its high point and its low point is

1.8 m and the cycle are repeated every 4 s. a. Determine a sinusoidal equation to model the vertical position, in metres, of the boat versus the time, in seconds. b. Use your model to determine when, during each cycle, the boat is 0.5 m above its mean position. [5 marks]