The signals in Figure P9.2 are zero except as shown. (a) For the signal xa[n] of Figure...

The signals in Figure P9.2 are zero except as shown.

(a) For the signal x_a[n] of Figure P9.2(a), plot the following:

(b) Repeat part (a) for the signal x_b[n] of Figure P9.2(b).

(c) Repeat part (a) for the signal x_c[n] of Figure P9.2(c).

(d) Repeat part (a) for the signal x_d[n] of Figure P9.2(d).