The table re[resents the forces on four objects, with directions.

Object F1 ↑ F2 → F3 ← F4 ↓

W 30 N 20 N 20 N 30 N

X 15 N 35 N 25 N 15 N

Y 60 N 0 N 0 N 60 N

Z 45 N 0 N 22 N 45 N

Which best explains the forces acting on the objects?

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