What is the weighted average duration assets?

\begin{tabular}{|l|l|l|l|l|l|l|l|} \hline Assets & \begin{tabular}{l} Market \\ Value \end{tabular} & Rates & \begin{tabular}{l} Duration \\ (Years) \end{tabular} & \begin{tabular}{l} Liabilities \\ And \\ Equity \end{tabular} & \begin{tabular}{l} Market \\ Value \end{tabular} & Rate & \begin{tabular}{l} Duration \\ (Years) \end{tabular} \\ \hline Cash & $150 & & & \begin{tabular}{l} Time \\ Deposits \end{tabular} & $500 & 4% & 1.25 \\ \hline Loans & $675 & 10% & 2.50 & CDs & $400 & 6% & 3.00 \\ \hline T-Bonds & $175 & 5% & 5.00 & Equity & $100 & & \\ \hline Total & $1,000 & & & & $1,000 & & \\ \hline \end{tabular}