2.5. A causal linear time-invariant system is described by the difference equation
y[n]-5y[n-1]+6y[n = 2] = 2x[n— 1].
(a) Determine the homogeneous response of the system, i.e., the possible outputs if x[n] =
0 for all n.
(b) Determine the impulse response of the system.
(c) Determine the step response of the system.
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