Take a look at the processes running on the practice PC with the ps command. How many processes are currently in the system? b) Take a look at the process tree with pstree. Which process has the most child processes? c) Start a new bash with the command bash and repeat the pstree command. Compare the new process tree with the process tree from the previous subtask. What differences are there? Which process number does the currently restarted shell have? d) Start a longer running process in the background. (Example: find ~ -print) Redirect the output of this process into a file. Which process number does this process have? e) Measure the runtime of the longer process if it is not running in the background