Answer Happy

I posted this question yesterday and you answered it wrong and incomplete and not accurate answer although I mentioned that this question already was answered on answers but it's answer was wrong and not accurate ..
please pay attention to what you are answering
6- A modulating signal m(t) has a spectrum as shown in Fig.2 is modulated using a carrier signal of amplitude 1.5 V and frequency of 90 KHz. M(f) (a) Sketch the spectrum of the modulated signal x(t) in case of: coherent DSB, coherent SSB, and AM with 25% modulation. 4 (b) Compare the output signal-to-noise ratio (SNR) at the output of each communication system mentioned in (a) given that the average signal power is 2.5 W, the received power is 1.5 mW, and the noise power spectral density at the receiver input is 10-12 W/Hz. f (KHz) Fig. 2 3 3
6- A modulating signal m(t) has a spectrum as shown in Fig.2 is modulated using a carrier signal of amplitude 1.5 V and frequency of 90 KHz. M(f) (a) Sketch the spectrum of the modulated signal x(t) in case of: coherent DSB, coherent SSB, and AM with 25% modulation. 4 (b) Compare the output signal-to-noise ratio (SNR) at the output of each communication system mentioned in (a) given that the average signal power is 2.5 W, the received power is 1.5 mW, and the noise power spectral density at the receiver input is 10-12 W/Hz. f (KHz) Fig. 2 3 3