10-1 102 103 BER 104 105 10-6 107 10 1 20 SNR(dB) 30 40 QAM256 (8 Mbps) QAM16 (4 Mbps) BPSK (1 Mbps) Now look at the table below with different SNRs associated with their distribution probabilities. For example, the table indicates that the probability is 25% when the SNR stays at 20dB. In the last two rows of the table below, first fill in the modulation scheme under each SNR, and then fill in its corresponding estimated BER under each SNR. 10 0.15 15 0.1 20 0.25 25 0.3 35 0.15 40 0.05 SNR (dB) Probability Modulation scheme picked estimated BER Now please calculate the average BER according on the probability distribution of each BER in the table above. 10-1 102 103 BER 104 105 10-6 107 10 1 20 SNR(dB) 30 40 QAM256 (8 Mbps) QAM16 (4 Mbps) BPSK (1 Mbps) Now look at the table below with different SNRs associated with their distribution probabilities. For example, the table indicates that the probability is 25% when the SNR stays at 20dB. In the last two rows of the table below, first fill in the modulation scheme under each SNR, and then fill in its corresponding estimated BER under each SNR. 10 0.15 15 0.1 20 0.25 25 0.3 35 0.15 40 0.05 SNR (dB) Probability Modulation scheme picked estimated BER Now please calculate the average BER according on the probability distribution of each BER in the table above