Hw Assignment

\documentclass[
	12pt, % Default font size, values between 10pt-12pt are allowed
	%letterpaper, % Uncomment for US letter paper size
	%spanish, % Uncomment for Spanish
]{fphw_assignment}

\usepackage{my_packages}

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\title{My Assignment \texttt{\#}1}        % Assignment title
\author{My Name}    % Student name
\roll{My Roll}                    % Class roll
\class{My Class}              % Class
\session{My Session}             % Session
\email{me@domain.edu}
\date{Today}        % Due date
\institute{Department of Physics}              % Institute or school name
\course{Course Name}                            % Course or course name
\professor{Teacher Name}                                           % Professor or teacher in charge of the assignment

%------------------------------------------------------------------------------------
\addbibresource{ref.bib} 

\setcounter{secnumdepth}{-2} 
%\renewcommand{\thesection}{}  % https://tex.stackexchange.com/a/30202/114006

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\begin{document}
\maketitle

%-----------------------------------------

\section{Problem 1 Name~\cite{book:zettili}}
\begin{problem}
  \lipsum[1][5-6]
\end{problem}

\subsection*{Solution:}
\blindtext
\begin{enumerate}[(a)]
\item 
\lipsum[2][5]
\item 
\lipsum[2][5]
\end{enumerate} 

\newpage
\section{Problem 2 Name~\cite{book:zettili}}
\begin{problem}
\lipsum[4][5-6]
\end{problem}

\subsection{Solution:}
\blindtext
\begin{figure}[!ht]
  \centering
  \includegraphics[scale=.3]{example-image-empty}
  \caption{ \lipsum[5][2]\cite{book:griffiths}}
  \label{fig:fig1}
\end{figure}

\section{Appendix}
\begin{problem}
  \centering  \lipsum[6][3]
\end{problem}
{\footnotesize
\blindtext \cite{book:balakrishnan}
}

\newpage
\printbibliography
%\printbibliography[heading=bibintoc]
\end{document}