Question 5 a. Assuming you are the network operation manager in one of the leading Telcos in the country, what best approach will you adopt to ensure that your old technology will match the new emerging technology to achieve efficiency, reliable, speed and good quality of signal. Discuss all steps involve to succeed in this task. CR[8] b. Expand on the scheme that permits only the high signals to be outputted when making available the modulating signal and the carrier wave. The discussion must touch on only two systems of the same output. AN[6] C. 5 Following a knowledge acquired in the principles of operation of pulse code modulation scheme, you are to do a comparison analysis on the PCM technique and the PLL drawn below in fig k. CR[4] x(t) eot) Loop Filter VCO Asin(wct + i) (x Reference signal Output Bcos(wct +00) Phase Locked Loop (PLL) Figure k. PLL. Total[20]