A device with input \( \mathrm{x}(\mathrm{t}) \) and outputy \( (\mathrm{t}) \) is characterized...

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A device with input \( \mathrm{x}(\mathrm{t}) \) and outputy \( (\mathrm{t}) \) is characterized by: \( y(t)=x^{2}(t) \). An FM signal with frequency deviation of 90 \( \mathrm{kHz} \) and modulating signal bandwidth of \( 5 \mathrm{kHz} \) is applid to this device. The bandwidth of the output signal is
(a) \( 370 \mathrm{kHz} \)
(b) \( 190 \mathrm{kHz} \)
(c) \( 380 \mathrm{kHz} \)
(d) \( 95 \mathrm{kHz} \).
(W)
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