As pictured below, insulating spherical shell with surface charge σs = 5.8 μC/m2 and radius R = 27.3 cm intersects an infinite plane with surface charge density σp = 5.2 nC/m2. If the center of the sphere is located 15.2 cm above the place, what is the magnitude of the electric field at the center of the sphere in NC? (Use the principle that E-fields add together) Type your answer...