According to vsepr theory, in which fashion will the bonds and lone pairs of electrons be arranged about the central atom in the following molecules or molecular ions?

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shape must be one of above: linear, octahedral, tetrahedral, trigonal bipyramidal, trigonal planar

1. o3 molecule (the central atom is o.) ? ?

2.pcl4+ ion (the central atom is p.) ? ?

3. seo2 molecule (the central atom is se.) ? ?