4 and 5

4. Given any directory, use the is command to display: all files and sub-directories starting with the letter "D" (note do not list anything in any sub-directory) its immediate sub-directories (sub-directories only, and no other ordinary files) its immediate hidden sub-directories only-take a screenshot (#3-3) that clearly shows the command and the result 5. Assume that the following files are in the working directory: $ ls intro notesb ref2 section 1 section3 section4b notesa ref1 ref3 section2 section4a sentrev Give commands for each of the following, using wildcards to express filenames with as few characters as possible. List all files that begin with "section". List "section1", "section2", and "section3" 3 files only. List the "intro" file only. List "section1","section3", "ref1", and "ref3" 4 files only. Include the command in the submission document (#3-4)