An electrically neutral thin, square metal slab, measuring 5.00 cm on a side, is placed in a uniform external field that is perpendicular to its square area. (a) If the top of the slab becomes negatively charged, what is the direction of the external field? (b) If the external field strength is 1250 N/C, what are the direction and strength of the field that is generated by the charges induced on the slab? (c) What is the total charge on the negative side of the slab?