b) Show the TCP port numbers for these services: smtp ftp finger 121-ftp-data- 79 ssh c) Which of the above is an alias for the service? What is the service's real name? d) Which of the services listed in b) are running? What is the total number of services that are running? 3. DIY commands (aliases) a) What happens when trying the ls dir command after saving , bash-aliases? b) What happens when trying the 1sdir command in a new terminal