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A biologist measures the soil pH at three locations \(D(-2, 3)\), \(E(2, 4)\), and \(F(0, -1)\).
The pH levels are: \(D: 6.5\), \(E: 7.2\), \(F: 5.8\).
Estimate the pH level at location \(P(1, 2)\) using nearest neighbor interpolation.
  1. Calculate \(PD^2\), \(PE^2\), and \(PF^2\).
  2. Which region contains \(P\)?
  3. What is the estimated pH level?

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