Answer:
(a) $3 billion
(b) -$1 billion
Step-by-step explanation:
All are in terms off billion
Y = 20
T = 2
C = 15
I = 2
we know that Y = C + I + G
20 = 15 + 2 + G
20 - 17 = G
G = 3
So the value of the goods and services purchased by the government of Yokovia = 3 billion
Public saving = T - G
= 2 - 3
= - 1 billion