Given an FIR filter described by the difference equation.
y[n] = 0.25x[n – 1] + 0.5x[n – 2] + 0.25x[n – 3],
(a) Find H(Ω), the DTFT of h[n].
(b) Find the phase of H(Ω) and simplify as much as possible. Is this a linear-phase filter?
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