Platinum (II) forms square planar complexes and platinum (IV) gives octahedral complexes . Describe the structures of geometrical isomers of following compounds :
(1) `[Pt(NH_(3))_(3)Cl]^(+)` (2) `[Pt(NH_(3))Cl_(5)]^(-)`
(3) `[Pt(NH_(3))_(2)ClNO_(2)]` (4) `[Pt(NH_(3))_(4)ClBr]^(2+)`