In a small open economy, output $($gross domestic product$)$ is $$20$ billion, government purchases are $$4$ billion, and net factor payments from abroad are zero. Desired consumption and desired investment are related to the world real interest rate in the following manner:

$\backslash$table$[[\backslash$table$[[$World Real$],[$Interest Rate$]],\backslash$table$[[$Desired$],[$Consumption$]],\backslash$table$[[$Desired$],[$Investment$]],\backslash$table$[[$National$],[$Saving$]],\backslash$table$[[$Net$],[$Exports$]]],[5\%,$$$12$ billion,$$5$ billion,$\frac{?}{\text{b}\text{a}\text{r}}($$$),\frac{?}{\text{b}\text{a}\text{r}}($ billion $),$$$,$billion$],[4\%,$$$13$ billion,$$6$ billion,$$,$billion,$$,$billion$],[3\%,$$$14$ billion,$$7$ billion,$$,$billion,$$,$billion$],[2\%,$$$15$ billion,$$8$ billion,$$,$billion,$$,$billion$]]$

For each value of the world real interest rate, find the value for national saving and net exports. Calculate net exports as the difference between output and absorption$.$

What is the relationship between net exports and foreign lending? Net exports are foreign lending.