The drawings show three charges that have the same magnitude but may have different signs. In all cases the distance d between the charges is the same. The magnitude of the charges is lql-9.3 C, and the distance between them is d=6.7 mm. Determine the magnitude of the net force on charge 2 for each of the three drawings. (a) F= i Fi (b) F= (c) F = i d d d +9 +q 2 3 1 +q 2 +q +q 3 1 21 ld (a) (b) (c) +q 3