\documentclass[minion]{homework}
\newcommand{\Reals}{\mathbb{R}}

\doclabel{Math F651: Homework 9}
%\docauthor{Your name here.}
\docdate{Due: April 13, 2018}
\begin{document}
\begin{aproblems}


\hproblem 6.9

\hproblem 6.12

\hproblem 6.13

\hproblem 6.15

\hproblem 6.16

\hproblem 6.21

\hproblem 6.22

\hproblem 6.23


\end{aproblems}
\end{document}

