In the figure three identical conducting spheres form an equilateral triangle of side length d = 27.5 cm. The sphere radii are much smaller than d and the sphere charges are q = -3.68 nC, qB = -3.13 nC, and qc = +7.91 nC. (a) What is the magnitude of the electrostatic force between spheres A and C? The following steps are taken: A and B are connected by a thin wire and then disconnected; B is grounded by the wire, and the wire is then removed; B and C are connected by the wire and then disconnected. What now are the magnitudes of the electrostatic force (b) between spheres A and C and (c) between spheres B and C? (a) Number (b) Number (c) Number MO Units Units Units N >