You are asked to create a file directory called $$team$\_$dropbox$$ that has the property that any member of a file permission group can create or read a file, but now one can delete a file except for the person who created it$.$ Show all the Bash shell commands you could type to create this directory. Explain what each command does and how each command contributes to achieving the desired effect. Note: There is more than one correct way to accomplish this task. $(15/30$ points$)$