How to find GDP with following condition?

Question

How can I find GDP for 2005 when government expenditures in creased by 5% or investment by 5%. (if GDP in 2004 is 100.)

Is there some sort formula that I can use or do I just multiple the government expenditures or investment by 5% serperately??

Answer 1

Y=C+I+G+(X-M)

were Y= GDP
c= consumer spending
I= investment
G= government consumption
X= exports
Y= imports

However, you need to know what was the weight of investment and of government spending on GDP to see what the final effect on GDP is.