Digital signal processing

2. Determine the Z transforms of the following signals and sketch the corresponding pole-zero patterns. (a) x(n)=(1+n)u(n) (b) x(n)=(an+an)u(n) a real 3. Determine , the causal signals x[n] whose z-Transform are given by (a) x(z)=1+1.5z10.5z21 (b) x(z)=10.5z1+0.6z21 4. Compute the Fourier transform of the following signals. (a) x(n)=u(n)u(n6) (b) x(n)=2"u(n) (c) x[n]=(41)nu(n+4)