Points A, B, and C form the vertices of a triangle in a nonuniform electrostatic field. The electrostatic work done on a particle of charge \(q\) as the particle travels from \(A\) to \(B\) is \(W_{A B}\), and that done on the particle as it travels from \(A\) to \(C\) is \(W_{A C}=-W_{A B} / 2\). How much electrostatic work is done on the particle as it travels from \(\mathrm{B}\) to \(\mathrm{C}\) ?