\begin{tabular}{|l|c|} \hline Investment & Average Return \\ \hline Small Stocks & 23.50% \\ \hline S\&P 500 & 13.10% \\ \hline Corporate Bonds & 7.30% \\ \hline Treasure Bonds & 6.10% \\ \hline Treasury Bills & 4.00% \\ \hline \end{tabular} What is the excess return for the portfolio of small stocks