The spectrum of a message signal m(t) is shown in Fig. 6 (a). To ensure communication privacy, this signal is applied to a system (known as a scrambler) shown in Fig. 6 (b). Analyze the system and sketch the spectrum of the output xtr). M(w) - M 0 WM (a) m(t) HPF LPF C 2 cos w 2 cos ezl (5) Fig. 6