\ (b) Repeat for

h(n)=(-0.8)^(n)u(n)

.Consider\

x(n)={(cos((n)/(20)),n=100):}

\ (a) Plot

x(n)

for

0

.\ (b) Use a computer to plot the output of a filter with impulse response\

h(n)={(0.5,n=0),(0.5,n=1),(0 else ):}

\ (c) Use a computer to plot the output of a filter with impulse response\

h(n)={(0.5,n=0),(-0.5,n=1),(0 else ):}

6. Consider x(n)={cos(n/20)cos(n/40)n