Chain and Work

[prepapphysics]

1. The problem statement, all variables and given/known data

A (uniform) chain with a mass of 4.7 kg and a length of 2.0 m lies on a table with 0.7 m hanging over the edge. How much energy is required to get all of the chain back on the table?

2. Relevant equations

W= integral(sumF)dx

3. The attempt at a solution

NO idea where to start.

[kuruman]

How much work is required to pull the center of mass of the overhanging 0.7 m over the edge of the table?