In the gure an electron {e} is to be released from rest on the central axis of a uniformly charged disk of radius R. The surface charge density on the disk is +4.09 LICK/m2. What is the magnitude ofthe electron's initial acceleration if it is released at a distance {a} R, {b} W111, and [cl Ill/1150 from the center ofthe disk? [3} Number a Units V [bl Number n Units V (C) Number n Units V