lementati ar time ystems by their u which is a form y h(n) to any give quations with co in the theory and linear difference shown to consist h represents the icular solution the difference nse of the LT Finite-duration ng on wh Problems 2.1 A discrete-time signal x(n) is defined as 1+3. -3≤ns-bois x(n) = 1, 0, 0 ≤ n ≤3 elsewhere (a) Determine its values and sketch the signal x(n). (b) Sketch the signals that result if we: da d 1. First fold x(n) and then delay the resulting signal by four samples. sql(a) 2. First delay x(n) by four samples and then fold the resulting signal. (c) Sketch the signal x(-n+4). 15 ads set (d) (d) Compare the results in parts (b) and (c) and derive a rule for obtaining the signal x(-n+ k) from x(n). tah and label carefully each of (e) Can you express the signal x(n) in terms of signals 8(n) and u(n)?