Please help solve this and please show work so i can get a better understanding of how it was solved

Consider the following statistics on an economy: GDP = $14 trillion; Taxes = $2 trillion; Private saving = $1 trillion Public saving = Negative -$1.5 trillion. Giving your answers in trillions, rounded to the nearest thousandth. if our economy were closed, What would consumption be? I What would government purchases be? I What would national saving be? I What would investment be? I Do these numbers lead you to believe that productivity is increasing or decreasing?| Now, assuming that we have an open economy, with imports totaling $2 trillion and exports totaling $1.5 trillion, What does national saving equa|?| Now that we have a view of our economy with trade, let us also consider the effects of the ination of recent years on our economy: Nominal GDP in 2007 was $14.07? trillion. Nominal GDP in 2008 was $14.441 trillion. Using 2005 as the base year, the GDP Deator for 2007 was 106 and the GDP Deator for 2008 was 108. What was real GDP in 2007 measured in 2005 prices