Answer:
$4 trillion
Step-by-step explanation:
Gross domestic product is the sum of all final goods and services produced in an economy within a given period which is usually a year.
GDP in an open economy is calculated using this formula:
Consumption spending + Investment spending + Government Spending + Net Export
Net Export = export - import
$1 trillion - $3 trillion = $-2 trillion
$12 trillion = $8 trillion + Investment spending + $2 trillion - $2 trillion
Investment spending = $12 trillion - $8 trillion = $4 trillion
I hope my answer helps you