Two Electrons Repel Each Other with a Force That Varies $k$

Multiple Choice

Two electrons repel each other with a force that varies inversely as the square of the distance between them, where $k$ is the constant of proportionality. One electron is fixed at the point $( 2,2 )$ . Find the work done in moving the second electron from $( - 4,2 )$ to $( 1,2 )$ .

A) $\frac { 215 k } { 3 }$ units of work
B) $\frac { 35 k } { 36 }$ units of work
C) $\frac { k } { 5 }$ units of work
D) $\frac { 5 k } { 6 }$ units of work
E) $\frac { k } { 10 }$ units of work