Question: By applying the properties of the auto correlation function, determine whether the following are acceptable for auto correlation functions. In each case, tell why or

By applying the properties of the auto correlation function, determine whether the following are acceptable
for auto correlation functions. In each case, tell why or why not.

(a) R₁ (τ) = 2 cos(10πτ) + cos (30πτ)

(b) R₂ (τ) = 1 + 3 cos (30πτ)

(d) R₄ (τ) = 4Λ (τ / 2)

(e) R₅ (τ) = 3II (τ / 6)

(f) R₆(τ) = 2 sin (10πτ)

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