The investment spending equals $12 billion, capital inflow equals -$2 billion, private savings equals $15 billion, budget balance equals -$5 billion.
National income formula is "Y" = C + I + G + X - M
100 = 70 + I + 20 + 10 - 12
100 = I + 88
I = $12
Hence, the Investment spending equals $12 billion
Y = C + I + G + XM
XM = Y - C- I - G
XM = 100 - 70 - 12 - 20
XM = -$2 billion
S = Y - T - C
S = 100 - 15 - 70
S = $15
Balance = T - G
Balance = 15 - 20
Balance = -$5
Because the budget balance is in deficit, then, the government is borrowing funds to finance its budget.
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