Include figures with caption for problem 2, 7, 8, and 10

latex/problems/problem2.tex

@@ -6,6 +6,8 @@ Point generator code: https://github.uio.no/FYS3150-G2-203/Project-1/blob/main/s
 
 Plotting code: https://github.uio.no/FYS3150-G2-2023/Project-1/blob/main/src/analyticPlot.py
 
-Here is the plot of the analytical solution for $u(x)$.
-
-\includegraphics[scale=.5]{analytical_solution.pdf}
+\begin{figure}[H]
+    \centering
+    \includegraphics[width=0.8\linewidth]{images/analytical_solution.pdf}
+    \caption{Plot of the analytical solution $u(x)$.}
+\end{figure}