Determine and sketch the impulse response of the following systems for n = 0, 1, . , 9....

Determine and sketch the impulse response of the following systems for n = 0, 1, . , 9.

(a) Fig. P2.51(a).

(b) Fig. P2.51(3).

(c) Fig. P2.51(c).

(d) Classify the systems above as FIR or IIR.

(e) Find an explicit expression for the impulse response of the system in part (c).