SOALAN/QUESTION 4 (15 MARKAH/MARKS) a) Jelaskan andaian berkaitan gelagat penggunaan yang harus berubah di dalam hipotesis kitaran hayat- pendapatan tetap bagi menjelaskan keperluan kepada tabungan sebagai langkah persediaan menghadapi kecemasan. Explain the assumption regarding consumers' behavior in the life-cycle-permanent-income hypothesis which needs to be changed in order to explain the presence of precautionary, or buffer-stock saving. b) Apakah hubungan antara model pencepat dalam pelaburan inventori dan model pencepat fleksibel dalam pengumpulan modal? What is relationship between the accelerator model of inventory investment and the flexible accelerator model of capital accumulation