Here in this theory, we have to find out no of atoms in a given plane, but this red marked line, it should be 1/6 not 1/4 acc to me. am i correct?please confirm

Planes n dilkout Cnystals - 00 1.Stmble Cubic Pand anglysir 3n S.c. ficat cmidn 0o) plon& In Planes (6 1o)(o ol), (100), H poopoby ans aams 100 No atoms om 100) Jyka plane X = 1 fo a plana, comrid atems a diuc (2dir Aae.a e ane= a PRannen deny no o atomy en unit oa Ca) (1 o) Plane