Three point charges 1 µC, -1 μC and 2 µC are kept at the vertices A, B and C respectively of an equilateral triangle of side 1 m. A₁, B1 and C₁ are the midpoints of the sides AB, BC and CA respectively. Calculate the net amount of work done in displacing the charge from A to A1, from B to B1 and from C to C1.