An amplitude modulator is shown in Figure Q2(a). The inputs of the product modulator are sinusoidal signals, where Um is a single tone message signal expressed as Vm= cos (2000nt) and ve is a carrier signal expressed as www Vm (t) Vc = cos (400000nt) Product modulator ve (t) Oscillator v (t) + ii. Compute the total power of the output signal vo(t). vo (t) Figure Q2(a): Amplitude Modulator i. Sketch with the aid of appropriate derivation of expressions, the magnitude spectrum of output signal vo(t).