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1. Digital signals can be encoded with a variety of signal levels. If we increase the number of possible levels from two to four, how many more bits can be sent in the same amount of time? Explain your answer. 2. Explain the drawbacks of increasing the number of signal levels. Consider an extreme case of using 1 million different signal levels (voltages) when encoding data. If a little is good, a lot must be a lot better, right