A square insulating plate, 2 meters by 2 meters, lies flat on the floor. A total charge Q = 8 10-8 C is distributed uniformly on the sheet. A pith ball (a small non-conducting ball made of a light spongy plant material called "pith"), also with charge Q = 8 10-8 C, is fixed 50 cm directly above the center of the plate. Point A is located 5 cm from the plate, directly below the pith ball, as shown. Pith ball 0.050 m 0.50 m +++++++++++ a) What is the electric field at A due to the plate (magnitude and direction)? b) What is the electric field at A due to the pith ball (magnitude and direction)? c) What is the net electric field at A (magnitude and direction)? d) What force (magnitude and direction) would an electron experience if it were located at point A?