Consider an open economy representing a three-sector macroeconomic model: C = 150 + 0.6 (Y - T); I = 350; G = 400; X - M

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Consider an open economy representing a three-sector
macroeconomic model: C = 150 + 0.6 (Y - T); I = 350; G = 400; X - M
= 250 and T = 100. Where C is consumption, I is planned investment,
G is government expenditure, (X - M) is net exports, and T are
taxes on income. What is the expenditure multiplier and the tax
multiplier respectively?
Select one:
a. 3 and -2.1
b. 3 and -0.67
c. 2.5 and -1.8
d. 2.5 and -1.5