1. Explain the differences between an increase in demand and an increase in aggregate demand. [10 marks] 2. Explain the difference between the components of aggregate demand and the determinants of aggregate demand, [10 marks) 3. Explain three factors that could cause an increase in the level of consumption in an economy. [10 marks] Explain how a change in interest rates is likely to affect the level of investment in an economy. [10 marks]