Answer:
$2 trillion
Explanation:
In a closed economy GDP is $12 trillion
Consumption is $8 trillion
Government spending is $2 trillion
Taxes is $0.5 trillion
Therefore the investment spending can be calculated as follows
= $12 trillion - $8trillion-$2trillion
= $2 trillion
Hence investment spending is $2 trillion
 
        
             
        
        
        
A fiscal year, is a 12-month financial planning period that may or may not coincide with the calendar year.
Explanation:
A fiscal year to the government is just like a financial year for a company/corporation. 
A government can have a fiscal year from the middle of a year (July) to the next year (June) which in total is 12 months.
Sometimes a fiscal year coincide with the calendar year but that does not acknowledge the fact that is must be a calendar year.
This fiscal period are a planned period to take up projects or meet budgets. 
 
        
                    
             
        
        
        
 frank and john can refer to the Gross Domestic Product (GDP) to understand how government economists view the price situation, GDP accounts for changes in price level and provide a more accurate figure of economic activities over a given period of time.
 
        
             
        
        
        
Answer:
Because it can be use by many people