6. The electrostatic potential in space is given by the scalar field ro-nx.yz)=e+(2z)2-4 sin(x) Volts Find the potential difference between the points P(1.1,1) and Q(0,0,0). Hint: Don't forget to put your calculator into radian mode! And don't forget units!) 7. The electric field in a certain region of space is given by the vector field E(7)=E(x,y,z)-(y+2)x + (z + x)y V/m Find any two points P(x V,2) and Q(x,,y2,Z2) such that the electric field at P is perpendicular to the electric field at Q. Evaluate the electric field at each of these two points. (Hint: Use the dot product.)