Question: 9. Need help with this question need both a and b plz 9. A boat tied up at a dock bobs up and down with

9. Need help with this question need both a and b plz

9. 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 1.8m and the cycle is repeated every 4s. a) Determine a sinusoidal equation to model the vertical position in metres of the boat versus the time in seconds. (Hint: amplitude, period, cycle, phase shift and vertical shift if necessary.) b) Use your model equation to determine when during each cycle the boat is 0.5m above its mean position. Round answers to nearest hundredth of a second. A/8

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