Answer:
Multiplier= 1.666667
Step-by-step explanation:
This is an open economy:
So the households can either save the income, or adquire imported goods.
also their income is reduced by taxes, so we must discount the three factors to get the multiplier.
marginal propensity to withdraw (mpw)
saving + tax rate + import
0.2 s + 0.05 t + 0.15 import = .4
Multiplier
1 / (1-mpw) = 1/0.6 = 1.66667