First, you need to write a sniffer program (by modifying the starter code) that prints out the source and destination IP addresses of each captured packet. You should provide screenshots as evidences to show that your sniffer program can run successfully and produces expected results. In addition, answer the following questions: i. In your own words, describe the sequence of the library calls that are essential for sniffer programs. (Just summary only) ii. Why do you need the root privilege to run a sniffer program