plot a cube with to planes in on figure

I have a question about a tipple integral but it was difficult to visualize the integration region which is part of the cub 0<x1, 0<y1, 0<z1 lying above the plane y+z=1 and below the plane x+y+z=2 how to sketch all of the in one figure? I tried this 2 ways but I dont know how to draw the cube here? is there i better way?

syms x y
ezsurf(y-1, [0, 1])
hold on
syms x y
ezsurf(2-x-y, [0, 1])