X[k] is a binary white noise process (i.e., a Bernoulli process with p = 1/2) and is given by X[k] = {+1 with probability 1/2 -1 with probability 1/2 What is the mean of this random process? What is the autocorrelation function? What is the covariance function? If a new random process is defined as the difference Y[k] = X[k] - X[k - 2] what is the mean of the process Y[k]? What is the autocorrelation function for the process Y[k]