Suppose z = f(x, y), where f is differentiable, x = g(t), and y = h(t). If g(5) = 8, g'(5) = 9, h(5) find dz / dt when t = – 7, h' (5) – 1, fa(8, – 7) = - 5, and f,(8, – 7) = – 3, %3D - 5.

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