deletions | additions       diff --git a/beginproblem_a_You_a.tex b/beginproblem_a_You_a.tex  index 9a8c5f2..4047629 100644  --- a/beginproblem_a_You_a.tex  +++ b/beginproblem_a_You_a.tex 
...
\textit{ Q.E.D.}  \end{proof}  \smallskip  \noindent  \\  (d)  \\*