How would I do b and c **Using the following information:**- \( C = 200 + 0.9Y_d \)- \( I = 250 \)- \( G = 100 \)- \( T = 100 \)\( Y_d = Y - T \), is disposable income.**(a)** Calculate the equilibrium level of income of this three-sector economy.**(b)** Calculate the spending multiplier.**(c)** Calculate the level of consumption at equilibrium in the economy.**(d)** Graph this three-sector model. Label everything.Now, we will explore the effects of expansionary fiscal policy on this model.**The case of an increase in Government expenditures (Expansionary fiscal policy)****(e)** Suppose that the government decides to increase government spending by 100 (while keeping taxes constant, i.e., \( T = 100 \), and \( G = 200 \)). Calculate the corresponding equilibrium level of income.**(f)** Calculate the new level of consumption at equilibrium in the economy.**(g)** Using the graph you obtained in part (d), graph the three-sector model (with \( G = 200 \) and \( T = 100 \)). Label everything.

Given C=200+0.9Yd ........... (1) I=250 G=100 and T=100 Where C represents consumption expenditure, I represents investment expenditure, G represents government purchases and T is tax. Yd is disposable income which is equal to Y-T In closed economy, the aggregate expenditure is equal to the level of GDP Y=C+I+GPutting valuesY=200+0.9Yd+250+100Y=200+0.9Y-0.9T+250+100Y-0.9Y=200+250+100-0.9TY=11-0.9200+250+100-0.9T Part B The spending multiplier is equal to 11-0.9=10 The spending multiplier is 10 Part C The equilibrium level of income: Y=11-0.9200+250+100-0.9×100⇒Y=10460⇒Y=4600 Putting the value of equilibrium income in consumption function: C=200+0.9Y-T⇒C=200+0.94600-100C=4250 So consumption is 4250.