To calculate the average rate of movement for the four islands mentioned (Molokaÿi, Kauaÿi, Midway, and Suiko), you would need to fill in the movement rates in centimeters per year (cm/yr) for each island. Once you have those values, you can follow these steps:
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Add the Rates: Sum the rates of movement for the four islands. \[ \text{Total Rate} = \text{Rate of Molokaÿi} + \text{Rate of Kauaÿi} + \text{Rate of Midway} + \text{Rate of Suiko} \]
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Calculate the Average: Divide the total rate by the number of islands (4). \[ \text{Average Rate} = \frac{\text{Total Rate}}{4} \]
Please provide the specific rates for each island to make the calculations.