Let Zt, t E Z, be a sequence of independent and identically distributed RVs with P(Zt = 1) = P(Zt = −1) = 17121 te Z. 2' Determine if the following processes are weakly stationary. [(a) Xt = ZtZ|t-1], te Z (b) Y₁ = Z²t, te Z

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A: False

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