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The depth of the tide \(d(t)\) in a harbour is modelled by \(d(t) = A \cos(B(t - C)) + D\).
High tide is 10 m and occurs at 02:00 (\(t=2\)).
Low tide is 2 m and occurs at 08:00 (\(t=8\)).
Find the values of the parameters \(A, B, C, \text{ and } D\).
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