QUESTION 4 (15 MARKS) SOALAN 4 (15 MARKAH) Given is the information of an economy (Diberikan maklumat bagi sebuah ekonomi) 800 + ( 0,6Y4 350 Consumption (C)(Perbelanjaan) Investment (1) (Pelaburan) Government Expenditure (G) (Perbelanjaan Kerajaan) Tax (T) Cukai) 400 200 Based on the information, answer the following questions: (Berdasarkan maklumat, jawab soalan berikut:) a. Find the value of marginal propensity to save (MPS) (Cari nilai Kecenderungan Menabung Marginal (MPS) (1 Mark/Markah) b. Derive the consumption and saving function. (Bentukkan fungsi penggunaan dan fungsi tabungan.) (4 Marks/Markah) Calculate the equilibrium level of national income using the: (Kirakan tahap keseimbangan pendapatan negara dengan menggunakan kaedah:) Aggregate Expenditure - Aggregate Supply approach (Kaedah Perbelanjaan Agregat - Penawaran Agregat) (5 Marks/Markah) ii. Leakage - Injection Approach (Kaedah Bocoran - Suntikan) (5 Marks/Markah)