Rank the work required to assemble the c...

Rank the work required to assemble the charge distribution below from leats to greatest. In all cases, the separation between the middle charge and the outer charges are the same. Use a reference of zero potential energy at `oo`.

`A lt B lt C=D`

`C=D lt B lt A`

`A lt B=C=D`

`B=C=D lt A`

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