Which of the following statements correctly describes the waveform corresponding to this frequency spectrum? Amplitude 5V 0.5 kHz Frequency O A sinusoidal signal with a frequency of 2 kHz and an amplitude of 7.5 V. O A complex signal with a frequency of 1 kHz and an amplitude of 2.5 V. O A sinusoidal signal with a frequency of 0.5 kHz and an amplitude of 2.5 V, plus a sinusoidal signal with a frequency of 1.5 kHz and an amplitude of 5 V. O A sinusoidal signal with a frequency of 0.5 kHz and an amplitude of 2.5 V and a third harmonic. 1.5 kHz

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