The signal y[n] = x1[n] + x2[n] + x3[n] is the sum of three periodic signals of %3D periods N1=2, N2=4, and N3=5, respectively. Then, the period of the signal y[n] is

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A: Since you have posted the questions with multiple subpart so we are supposed to answer 3 subpart.

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Frequency Modulation

Frequency modulation is a method or process of encoding the data of a specific signal (analog or digital) by modulating the carrier wave frequency according to the frequency of the modulated signal. Modulated signals are nothing more than information or data that should be conveyed after being converted into electronic signals.