4. Given x(t) = 4(t + 2)u(t + 2) — 41u(t) — 4u(t — 2) — 4(1 — 4)u(t — 4) + 4(t — 5)u(t — 5), find and sketch x(21 — 4).
5. For each of the signals given, determine mathematically whether the signal is even, odd, or neither. Sketch the waveforms to verify your results. (a) x(t) = —41 (b) x(t) = Chi (c) x(t) = 5cos 31 (d) x(t) = sin(3t — (e) x(t) = u(t)
