The table gives the basis functions for the group \(\mathbf{6 2 2}\). What are the gerade (+) and ungerade (-) irreducible representations of the group \(6 / \mathbf{m m m}=\mathbf{6 2 2} \otimes \overline{\mathbf{1}}\) ?

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basis functions z, x + y A2 z, Lz B1 B2 x, y, xz, yz, Lx, Ly E1 x-y, xy E2