Started on 0.3.6, but renamed the file

assignments/main_text.tex

@@ -1,5 +1,6 @@
 \documentclass{latex-homework/homework}
 
+\usepackage{enumitem}
 \usepackage{subfiles}
 
 \title{MIT OCW Real Analysis}
@@ -8,5 +9,5 @@
 
 \begin{document}
 \maketitle
-\subfile{week1/0.3.6.tex}
+\subfile{week1/1.tex}
 \end{document}

assignments/week1/0.3.6.tex

@@ -1,6 +0,0 @@
-\documentclass[../main_text.tex]{subfiles}
-\begin{document}
-
-\exercise
-
-\end{document}

assignments/week1/1.tex

@@ -0,0 +1,22 @@
+\documentclass[../main_text.tex]{subfiles}
+\begin{document}
+
+\exercise*[0.3.6]
+\begin{enumerate}[label=\emph{\alph*)}]
+    \item Wanting to show:
+        $A \cap (B \cup C) = (A \cap B) \cup (A \cap C)$
+
+        In order to prove this equivalence, we have to prove the implication both ways. We use two lemmas for this.
+
+        \begin{lemma}[test]
+            $A \cap (B \cup C) \implies (A \cap B) \cup (A \cap C)$
+
+            Let $x \in A \cap (B \cup C)$.
+        \end{lemma}
+        \begin{definition}
+            Test.
+        \end{definition}
+    \item
+\end{enumerate}
+
+\end{document}