For electromagnetic waves in vacuum, the electric field component and magnetic field component are related to each other by = , where = 3.00 100 m/s is the light speed. If the electric field is = 100 N/C , find the total energy density of the electromagnetic wave, including contributions from both electric and magnetic fields. (constants that might be useful: / = 8.85 101!"C"/N m", / = 4 1012 N/A")