A satellite is operated at C-Band (6 GHz in the uplink and 4 GHz in the downlink) for video broadcasting. Calculate the free-space loss experienced at this frequency, if the satellite is in geostationary orbit (GEO), located at 36 000 km above ground level. What is the minimum EIRP needed to provide adequate reception, assuming a receiver sensitivity of -120 dBm and effective antena gain of 20 dBi?