Errors in an experimental transmission channel are found when the transmission is checked by a certifier that detects missing pulses. Let X be the number of errors found in an eight-bit byte with the following PMF. 1. verify that this is a valid PMF. etermmine the mean of X p(x) 3. Determine EX^2) 4ormine Var (X) using the definition. 5. Compute E(X²) - [E(X)]². 1 0.7 4 7 0.2 0.1

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