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Q2: Sketch the following signals.(a) x[n]=u[n+5]-3u[n+1]+u[n-1]+u[n-4](b) x[n]=r[n](u[n+4]-u[n-5])(c) x(t)=3u(t+4)-u(t+2)-u(t-1)+2u(t-3)(d) x(t)=∑i=-
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