a digital signal represented by a binary voltage +5.55 and -4.5V , is transmitted over an AWGN channel with noise standard dev 1.12 V.Compute the volt. f the optimum thresholdwhen the priori probabilities of the binary source are a follows
i) P(0) = 0.4
ii) P(1) = 0.25
iii) P(0) = 0.5