show calculations please

\begin{tabular}{|l|r|r|} \hline Input Area: & \multicolumn{1}{c|}{ Part 1 } & \multicolumn{1}{c|}{ Part 2 } \\ \cline { 2 - 3 } & \multicolumn{1}{|c|}{7} & \\ \cline { 2 - 3 } Average asset duration & 4 & 4 \\ Average liability duration & 1,800,000,000 & 1,800,000,000 \\ \hline Total assets & 1,500,000,000 & 1,500,000,000 \\ \hline Total liabilities & 5.00% & 5.00% \\ \hline Initial interest rate \\ \cline { 2 - 3 } Interest rate after change \end{tabular} \begin{tabular}{|c|c|c|} \hline Output Area: & & \\ \hline ChangeininterestratesChangeinnetworth & Part 1 & Part 2 \\ \hline \end{tabular}