An antenna pointing in a certain direction has a noise temperature of 50 K. The ambient temperature is 290 K. The antenna is connected to a pre-amplifier that has a noise figure of 2 dB and an available gain of 40 dB over an effective bandwidth of 12 MHz. The effective input noise temperature Te for the amplifier and the noise power Pao at the output of the preamplifier, respectively, are

• A. Te = 169.36 K and Pao = 3.73×10-10 W
• B. Te = 170.8 K and Pao = 4.56×10-10 W
• C. Te = 182.5 K and Pao = 3.85×10-10 W
• D. Te = 160.62 K and Pao = 4.6×10-10 W