Magnitude distribution in the g band for stars included in both the YMCA and STEP catalogues and having the position angle in the range 55 ° ≤PA ≤ 95°. The panels in the first two rows display ∼4360 stars with magnitudes between g₀ = 17.5 mag and g₀ = 20.5 mag, while the panels in the last two rows contain ∼1370 stars within the same range of magnitudes. At the top of each sub-panel the interval of distances from the SMC centre is reported. The blue solid lines represent the Gaussian distributions of RC stars, whereas the red solid line is the quadratic polynomial modeling the distribution of stars along the RGB. The black solid line illustrates the best-fit model derived from the combined contributions of both stellar evolutionary phases.