Answer:
1.- Investment 75 millions
2.- Savings 75 millions
3.- national saving equals investment
Explanation:
The GDP in a closed economy equals to the consumption plus investment plus government spending
GDP = C + I + G
250 = 150 + I + 25
250 - 150 - 25 = I
Investment = 75
Then, investment is equal to private savings plus government savings
T-G = public saving (or deficit)
S = private savings
I = S + ( T - G )
75 = S + (25-25)
S= 75
As this is, a closed economy their national savings defines their investment. There is no capital inflow or outflow from aboard.