An electromagnetic plane wave at a certain location has an electric field pointed up which is given as a function of time as E = 54 V/m x sin (6x10^6 Hz x t). The magnetic field at the same location points south when the electric field points up. The wave described above is incident on a square piece of foil which is 3.6 m long on each side. If the wave is completely absorbed by the foil for 35 seconds, how much energy does the foil absorb? Assume the foil is set up in the south-up plane.