Consider a wireless LAN system with the following system specifications: 5 GHz carrier frequency, 20 MHz bandwidth, 2 Bi antenna gain at the transmit side, 2 dBi antenna gain at the receive side, 16 dB fading margin, 90 dB path loss, 20 dBm power at the transmit side, 3 dB losses at the transmit side, and 5dB required SNR. What is the maximum admissible radio frequency noise figure? Consider that the power spectral density of the ambient receive noise is 174 dBm/Hz.