Answer:
b) shade the two boxes next to the one that is shaded
c) shade the 4 corners
Explanation:
b) if one box shaded is 1/9, then having 3 shaded total is 3/9 which is 1/3 of total
c) You can shade the 4 corners (one is already shade for you)
This will create a vertical and horizontal line of symmetry in the middle