3. Television channels are 10MHz wide. 1) How many bits/sec can be sent if four-level digital signals are used? Assume a noiseless channel. (5 points) 2) How does the maximum data rate change if the channel is noisy, with a signal-to-noise ratio of 2 dB? (100.2 =1.58, log22.58 = 1.37, log102 = 0.301) (5 points)