For point charge 3.4 C and point charge -8.1 C located at the same positions as in the previous question (5 m and 4 m,

For point charge 3.4 µC and point charge -8.1 µC located at the same positions as in the previous question (5 m and 4 m, respectively), determine the magnitude of the net electric field E at the origin (in N/C). Your answer should be a number with two decimal places, do not include the unit.