Statement: Some books are trees. All tress are roads. All roads are wheels. Conclusions: I. Some wheels are books. II. Some roads are books. III. Some wheels are trees.

Some books are trees + All tress are roads = I + A = I = Some books are roads (I) Hence II follows. Some books are trees + All roads are wheels = I + A = I = Some books are wheels → conversion → Some wheels are books (I) Hence I follows. All trees are roads + All roads are wheels = A + A = A = All trees are wheels → conversion → Some wheels are trees (I) Hence III follows.