4. Encode the data stream 1001110 using Manchester line coding. State any required assumptions (such as the value of the previous bit, if necessary) in your solution. Please be neat and show bit times. 5. What data is being sent by the signal below using Manchester line coding? ULUUL 6. An analog data signal contains frequencies from 1000 Hz to 4000 Hz. We wish to convert this to a digital signal using Pulse Code Modulation. Assume that there will be 128 possible quantized values. What is the minimum sampling rate according to the Nyquist Theorem? b. a. How many bits are required to represent each value? Assuming the bits/sample and sampling rate calculated above, what is the bit rate? c. 7. We currently have a perfect channel which accepts frequencies between 200 KHz and 700 KHz and transmits a signal with 8 signal levels. We need to upgrade the channel to a higher channel capacity. Answer the following questions. What is the current capacity? What do we have to change the bandwidth to in order to double the channel capacity? a. b. 8. You need to send 240 Kbps over a perfect channel with an analog bandwidth of 40 KHz. How many signal levels do you need? 9. What is the channel capacity of a noisy channel with an analog bandwidth of 300 MHz and a signal to noise ratio of 15 (not in dB)? 10. Answer the following questions concerning error detection: 10.1 Assume odd parity. The single-bit parity for the data 11101011 is a. b. 1 e. 00010100 d. Cannot be determined