\documentclass{article}
\usepackage[letterpaper,top=0.25in,bottom=0.15in,left=0.5in,right=0.5in,includeheadfoot]{geometry}
\usepackage{amssymb,amsmath}
\usepackage{parskip}
\usepackage{fancyhdr}
\usepackage{tabu}
\usepackage{enumerate}
\usepackage{graphicx}
\usepackage{xcolor}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%% TODO: MODIFY THINGS HERE %%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Enter your PennID, collaborators, and hw number.
\newcommand{\MyID}{Your 8 digit ID}
\newcommand{\MyRecitation}{2XX}
\newcommand{\CollaboratorNames}{ADD COLLABORATORS HERE}
\newcommand{\HomeworkNo}{XX}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


% DO NOT MODIFY ANYTHING HERE
\newcommand{\multichoose}[2]{\left(\!\genfrac{(}{)}{0pt}{}{#1}{#2}\!\right)}
\renewcommand{\baselinestretch}{1.3}
\pagestyle{fancy}
\fancyhead{}
\fancyfoot[L]{\MyID{}}
\fancyfoot[R]{Homework \HomeworkNo{}}
\renewcommand{\headrulewidth}{0pt}
\renewcommand{\frac}[2]{\dfrac{#1}{#2}}
\setlength{\headheight}{0pt}
% DO NOT MODIFY ANYTHING HERE
\fancypagestyle{firstpage}{
  \fancyhead{}
  \fancyfoot{}
}
% DO NOT MODIFY ANYTHING HERE
\newcommand{\MyIDCheck}[1]
{\ifnum\pdfstrcmp{#1}{Your 8 digit ID}=0
   \LARGE\textcolor{red}{#1}
\else
   #1
\fi}
% DO NOT MODIFY ANYTHING HERE
% \newcommand{\MyRecitationCheck}[1]{\ifnum\pdfstrcmp{#1}{2XX}=0
%    \huge\textcolor{red}{#1}
% \else
%    #1
% \fi}
% DO NOT MODIFY ANYTHING HERE
\newcommand{\MyHomeworkNoCheck}[1]{\ifnum\pdfstrcmp{#1}{XX}=0
   \huge\textcolor{red}{#1}
\else
   #1
\fi}
% DO NOT MODIFY ANYTHING HERE
\newcommand{\MyCollaboratorCheck}[1]{\ifnum\pdfstrcmp{#1}{ADD COLLABORATORS HERE}=0
   \LARGE\textcolor{red}{#1}
\else
   #1
\fi}
% DO NOT MODIFY ANYTHING HERE
\newcommand{\PrintFirstHeader}{
  CIS 1210 \vspace{5pt} \hfill {\Large\MyIDCheck{\MyID}}
  \\
  {\LARGE{\textbf{Homework \MyHomeworkNoCheck{\HomeworkNo}}}} \vspace{5pt} 

  {\large Collaborators: \MyCollaboratorCheck{\CollaboratorNames}}
  
  \rule{\textwidth}{0.4pt}
}
\begin{document}
\thispagestyle{firstpage}
\PrintFirstHeader{}
%
%
%
%% ONLY MODIFY BELOW HERE 
%% (Besides entering your name, recitation, and collaborators above)
%
%
%
\begin{enumerate}[\bf Q1.]
  \setlength\itemsep{1em}

	% Question 1
    \item\hfill\begin{enumerate}
		% Question 1a        
        \item 
              
              
        % Question 1b  
        \item
    \end{enumerate}
    
    
    % Question 2
    \item\hfill\begin{enumerate}
		% Question 2a        
        \item 
        
        
        % Question 2b
        \item
    \end{enumerate}
    
    
    % Question 3
    \item\hfill\begin{enumerate}
	    % Question 3a        
        \item 
        
        % Question 3b
        \item
    \end{enumerate}
    
    
    % Question 4
    \item 
    
    
    % Question 5
    \item 


\end{enumerate}
%
%
%
%% ONLY MODIFY ABOVE HERE
\end{document}\\\\\\