1) A surface completely surrounds a 2E-6 C charge. find electric flux through this surface when surface ia a sphere with radius 0.25 m, or a cube with edges that are 0.25 m long.
2) A gaussian surface completely encloses the following four charges: 2.7 microC, 8.3 microC, -5.5 microC. Calculate the electric flux through this surface.