Part A: File Manipulation and Sorting $(18$ points$)$

$1.$ Create a File: Using vi or nano, create a file named "people" with the following entries. Ensure to use tabs between fields:

$2.$ Sort by Last Name: Sort the "people" file by last name and save the output to a file named "peoplelast".

$-$ Command used: sort $\backslash (-\backslash$mathrm$\{$k$\}2,2\backslash )$ people $>$ peoplelast

$3.$ Sort by Occupation: Display the sorted list by occupation on the screen. Paste a screenshot of the output.

$-$ Command used: sort $\backslash (-\backslash$mathrm$\{$k$\}4,4\backslash )$ people

$4.$ Append File: Create another file named "presidents" with similar format and append it to "people" to create "peopletwo".

$-$ Command used: cat presidents $\backslash$$$3$ people

$5.$ Remove Line Numbers and Sort: Remove line numbers and sort by last name.

$-$ Command used to remove line numbers: cut $-$f$2-$ people $|$ sort $-$k$2,2.$ Paste a screenshot of the output.

$6.$ Convert to lowercase: Convert all uppercase letters in "peopletwo" to lowercase.

$-$ Command used: tr $\text{'}[$upper:$]\text{'}\text{'}[-$lower:$]\text{'}$ peopletwo $>$ peopletwo.lower

$-$ Display the content of the new file using 'cat' and paste a screenshot of the output.

$7.$ Extract First Names: Extract all first names into a file named "first".

$-$ Display the content of the new file using 'cat' and paste a screenshot of the output.

$8.$ Extract Last Names: Extract all last names into a file named "last".

$-$ Command used: cut $-$f $3$ people $\backslash (>\backslash )$ last

$-$ Display the content of the new file using 'cat' and paste a screenshot of the output.