The electric field intensity of a plane wave travelling in free space is given by: \(\vec{E} (x,t) = 24 \pi \cos(\omega t - k_0 x) \) V/m. In this field consider a square area of 10 cm X 10 cm on a plane x+y =1 with wave impedance of \(120 \pi \). The total time averaged power (in W) passing through the square area is?