Give the electronic configuration of the following complexes on the basis of crystal field splitting theory. `[CoF_(6)]^(3-), [Fe(CN)_(6)]^(4-)` and `[Cu(NH_(3))_(6)]^(2+)`.

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`(CoF_(6))^(3-) , Co^(3+)` ion has config : `(t_(2_(g)))^4e_(g)^(2)`
`[Fe(CN)_(6)]^(4-) , Fe^(2+)` ion has config: `(t_(2_(g)))^6e_(g)^(0)`
`[Cu(NH_(3))_(6)]^(2+)`,`Cu^(2+)` ion has config: `(t_(2_(g)))^6e_(g)^(3)`

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