Question: State whether or not a stationary stochastic process can have the following values of autocorrelations: (a) ????1 = 0.80, ????2 = 0.55, ???????? = 0,

State whether or not a stationary stochastic process can have the following values of autocorrelations:

(a) ????1 = 0.80, ????2 = 0.55, ???????? = 0, for ???? > 2

(b) ????1 = 0.80, ????2 = 0.28, ???????? = 0, for ???? > 2

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