8. The Excel file Portfolio Bond Weight Calculation Data contains information about three bonds. Coupons are paid annually. Use matrix algebra and this data to construct a portfolio consisting of Bond 1, Bond 2, and Bond 3 that has a duration of 9 years, subject to the condition that the proportion invested in Bond 2 is 22% larger than the proportion invested in Bond 1. \begin{tabular}{|c|} \hline 1 \\ \hline 2 \\ \hline 3 \\ \hline 4 \\ \hline 5 \\ \hline 6 \\ \hline 7 \\ \hline 8 \\ \hline 9 \\ \hline 10 \\ \hline 11 \\ \hline \end{tabular}