For an ADC, According to the Shannon/Nyquist criteria we need to sample at twice the rate of the highest input frequency we input.For a high fidelity audio system the cutoff of human hearing is no higher than 20Khz So most high fidelity audio systems sample at 44.1Khz. If our sample rate(frequency) is 44.1Khz what would be our sampling period of the incoming signal. Make sure to display your answer with engineering units.