I want to get the table of the following image, I currently have the table but I am missing the part that is drawn
\documentclass[]{article}
\usepackage[table]{xcolor}
\usepackage{boldline}
\begin{document}
\begingroup
\def\arraystretch{2.2}%
\begin{tabular}{V{4}p{25mm}|c|c|c|p{25mm}|c|c|cV{4}}
\hlineB{3}
\hline
\multicolumn{4}{V{4}cV{1}}{aaaaa} & \multicolumn{4}{cV{4}}{aaaaa} \\ \hline
\hline
\rowcolor{cyan}
1 & 1e-1 & 1e-2 & 1e-2 & 1e-1 & 1e-2 & 1e-2 & 1e-2 \\
\hline
1 & 1e-1 & 1e-2 & 1e-2 & 1e-1 & 1e-2 & 1e-2 & 1e-2 \\
\hline
1 & 1e-1 & 1e-2 & 1e-2 & 1e-1 & 1e-2 & 1e-2 & 1e-2 \\
\hlineB{4}
\end{tabular}
\endgroup
\end{document}

