5. A system using matched filter detection of equally likely BPSK signals, s,(t) V2E/T cos e and s(t)= V2E/T cos (1+), operates in AWGN with a received Es/No of 6.8 dB. Assume that Elz(7))=±VE (a) Find the minimum probability of bit error. PB, for this signal set and E,/No. (b) If the decision threshold is y=0.1 VE, find Pg. (c) The threshold of y=0.1 VE is optimum for a particular set of a priori probabili- ties, P (s) and P(s). Find the values of these probabilities (refer to Section B.2).