Take a random sequence of bits and perform source coding using Huffman code. Write an optimization function for a 4 way traffic intersection, where vehicles are coming in from all directions. [Hint: Think cars as client in need of service arriving at an arrival rate and traffic light as the server process with a service rate] Drive the bit error rate of BPSK. Write a regular expression in Perl to search for a string pattern.( this was unexpected since I had told them I did not know perl ) How would you test a Modem if you get complaints from field about cell phones not working. Describe the test cases.