For a disk of radius R = 16 cm and Q = 8 x 10- C, calculate the magnitude of the electric field 5 mm from the center of the disk using all three formulas below, and using the accurate value &g = 8.85 x 10-12 C2/(N-m2). Q/A (a) Formula 1: = 260 1 Z (R2 + 22)1/2 X N/C (b) Formula 2: E = 2ED QIA 1 - N/C Q/A (c) Formula 3: E = N/C