Results of the fit using the Levenberg-Marquardt algorithm for the first target as a function of the observed frequency: the upper panel is associated with Model_7.1 which used the average large frequency separation and the individual r₀₁ and as constraints; the central panel is associated with Model_7.2 which used individual Δν_n,l and as constraints; the lower panel is associated with Model_7.3 which also used individual Δν_n,l and as constraints.