A charge of \(8~\text{mC}\) is located at the origin. The work done in taking a small charge of \(-2\times 10^{-9}~\text C\) from a point \(P (0, 0, 3~\text{cm})\) to a point \(Q (0, 4~\text{cm}, 0),\) via a point \(R (0, 6~\text{cm}, 9~\text{cm})\) is:
1. \(3.27~\text J\)
2. \(1.27~\text J\)
3. \(0.27~\text J\)
4. \(2.70~\text J\)