Calculate Work Done by Field to Remove 5µC Charge from Equilateral Triangle

[flynostrich08]

Homework Statement

I built a configuration of charge on an equilateral triangle with side length of 10cm shown
below. I decided however that I have one to many charges and wish to remove the 5μC charge completely. How much work is done by the field when I remove the charge?

The triangle has a -5µC up top then a 10µC on bottom left and finally a 5µC on the bottom right. Thanks for any help

Homework Equations

The Attempt at a Solution

I have no idea where to begin, thanks for any help.

 

[graphene]

Do you know the relation between work done and potential ?
And how to find the potential of a charge at a given distance?