Can really use some help with the following UNIX/LINUX commands and questions: Part 1: Please show the command that would include the IFT383ss16 directory in my PATH Part 2: Please show the command to set the environment variable HISTSIZE to 20 Part 3: Command to create an environment variable ISON that contains the list (usernames of people who were logged in at the time I logged in. Part 4: Command the display the message \"Welcome \" Part 5: Command to display the message \"Today is \" Solution Part 1: PATH=$PATH:/IFT383ss16 Part 2: export HISTSIZE=20 Part 3: set ISON Part 4: echo \"Welcome\" whoami Part 5: echo \"Today is\" `date`.