Three-point charges, Q1=30 nC at (0,0,0), Q2=150 nC at (2,0,0), and Q3=-70nC at (0,3,2) with coordinates expressed in (x,y,z) and in meters. 1- What is the electric flux through a sphere of 3 m radius centred on the coordinate origin? 2- What is the electric flux through the sphere if the radius is only 1 m radius and still centred on the coordinate origin?