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Suppose we want to transmit the sound of a two chime doorbell
(f1=349 Hz, f2= 440 Hz) using VLF (very low frequency)
communications (let fc 20 kHz). Each of the chimes has an
amplitude of 10V, and the carrier's amplitude is 20V. Sketch
the frequency domain representation of the transmitted signal
and determine the bandwidth.
Which of the two chime frequencies determines the
bandwidth?

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solve AND explain each step
For part c, why is Mnet and M2 negative?

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