[40p)-1. Single side band (SSB) modulation is applied to a message MF) signal m(t) to generate single side band modulated signal Ssse(t) for the lower side band. The carrier is c(t) = cos(200000 nt) and f (kHz) amplitude spectrum of the message signal M) is depicted in Fig.1. Fig. 1 (a) Find the single side band modulated signal Ssse(t). (b) Find and draw frequency spectrum of the single side band modulated signal Ssse) =? (c) Design and sketch block diagram of a coherent demodulator to obtain the m(t). (d) Show that with the demodulator designed in 1(c), m(t) can be fully obtained.