Fitting procedure for HD 74000. The top left panel shows the observed Ca I 6162 Å line (open circles) and synthetic spectra for three values of Γ. The top right panel shows the reduced χ² residuals as a function of the macroturbulence. The bottom left panel is the observed Li I line (open circles) and synthetic spectra for three values of f(⁶Li). The bottom right panels illustrates the reduced χ² residuals vs. ⁶Li fraction for three values of the macroturbulence.