You are hoping to get an estimate of the number of birch trees in a local park.  You have a satellite image of the park, and plan to use quadrat sampling to estimate the number of birch trees in the park.  The park is 1000m by 1000m.  Describe how you can set up your quadrat and how you would then use the data you collect to estimate the number of trees in the entire park. (Include a sample calculation).

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