\documentclass[10pt]{article}
\usepackage[margin=1in]{geometry}
\usepackage{amsmath,amsthm,amssymb, graphicx, multicol, array}
\newcommand{\N}{\mathbb{N}}
\newcommand{\Z}{\mathbb{Z}}
\newenvironment{problem}[2][Problem]{\begin{trivlist}
\item[\hskip \labelsep {\bfseries #1}\hskip \labelsep {\bfseries #2.}]}{\end{trivlist}}
\begin{document}
\title{Problem Set Template}
\author{Your name\\
Course number: Course name}
\maketitle
\begin{problem}{1.1}
Delete this text and write theorem statement here.
\end{problem}
\begin{proof}[Solution]
Write a solution here
\begin{align*}
x &= y
\end{align*}
\begin{tabular}{| >{\centering\arraybackslash}m{1in} | >{\centering\arraybackslash}m{1in} | >{\centering\arraybackslash}m{1in} | >{\centering\arraybackslash}m{1in} |>{\centering\arraybackslash}m{1in} |}
\hline
\textbf{A} & \textbf{B} & \textbf{C} & \textbf{D} &\textbf{E} \\[8pt]
\hline
a & b & c & d & e \\[8pt]
\hline
f & g &h & i & j \\[8pt]
\hline
\end{tabular}
\end{proof}
\end{document}
