1) Query installed packages with the dpkg or dpkg-query command a) Browse programs installed in your system. What is a more effective way to browse this list? b) Use dpkg -l" command to query currently installed software. How many programs are currently installed? c) Search packages related to Firefox, and save the result to a file. How many packages are there? d) What are the files related to Firefox? Please use a command to list these files in the /etc directory