Q1. For each of the following signals, find the z-transform, its poles and zeros, and the region of convergence (ROC): (a) xa[n] = " u[-5 – n] (b) x,[n] = (-5" sin () u[n] (с) х.[п] %3D (-1)" (u[n +...

Extracted text: Q1. For each of the following signals, find the z-transform, its poles and zeros, and the region of convergence (ROC): (a) xa[n] = " u[-5 – n] (b) x,[n] = (-5" sin () u[n] (с) х.[п] %3D (-1)" (u[n + 3] — u[n — 3)) (d) ха[п] — 6[n — 3] + G)" u(n - 4] (e) xe[n] = (-|| 2nn 13