[10] (1) A small sphere of mass 1.0:10-6 kg carries a total negative charge of 2.0:x10-8 C. The sphere hangs from a silk thread between two large parallel conducting plates. The excess charge on each plate is equal in magnitude, but opposite in sign. If the thread makes an angle of 30k with the left plate as shown, what is: [5.01(1.a) the magnitude and direction of electric field, [2.5](1.b) the direction of electric field, and [2.5](1.c) magnitude of the charge density on each plate