The following complexex are given: (1) trans−[Co(NH3)4Cl2]+ (2) cis−[Co(NH3)2(en)2]3+ (3) trans−[Co(NH3)2(en)2]3+ (4) [NiCl4]2− (5) [TiF6]2− (6) [CoF6]3− Choose the correct code: