A FM signal that arrives at the receiver is given below: s(t) = 2 cos [210 t + 3 sin(2x500t) - 5 cos(2200)] (a) (4 points) Determine the bandwidth of this FM signal. (b) (3 points) This signal is to be demodulated using a frequency discriminator. (b.1) If s(t) is directly applied to the envelope detector, what is the output of the detector? (b.2) If s(t) is differentiated first, and then applied to the envelope detector, what is the output of the differentiator and the detector? Explain which of the above two outputs can be processed to yield the message signal. (c) (1 point) If k = 200 Hz/V, determine the message signal m(t).