Δ_{F110W,F160W,F115W,F322W2} vs. Δ_F606W,F110W ChM of M dwarfs in field C (panel (a)). Panels (b)–(e) illustrate the procedure used to estimate the fractions of 1P and 2P stars. The observed ChM is further reproduced in panel (b), while panel (c) shows the simulated ChM where simulated 1P stars are colored in red. The colored solid lines delimit the four regions used to infer the fraction of stars in each population, while the colored dots mark the average positions in the ChM of the simulated stellar populations. Panels (d) and (e) show the Δ_{F110W,F160W,F115W,F322W2} and Δ_F606W,F110W kernel distributions for the observed (black line) and the simulated (gray line) stars.