Charges of -20uC, -3QuC and + 40uC are at the vertices A, B and P of an equilateral triangle of side 0.02 m. Calculate: The magnitude of the force exerted on the charge at P by the charge at A The magnitude of the force exerted on the charge at P by the charge at B The magnitude and direction of the resultant force exerted on the charge at P by the charges at A and B