Consider a constant random process, X (t) = A, where A is a random variable. Use Definition A discrete random process, X[n], is generated by repeated tosses of a coin. Let the occurrence of a head be denoted by 1 and that of a tail by - 1. A new discrete random process is generated by Y [2n] = X [n] for n = 0, ± 1, ± 2 … and Y[n] = X [n + 1] for n odd (either positive or negative). Find the autocorrelation function for Y[n] to calculate the PSD of X (t).