Explain whether each of the following events increases or decreases the aggregate demand curve (AD) or short-run aggregate supply curve (SRAS) or long-run aggregate supply curve (LRAS) or both SRAS and LRAS. (No need to draw graphs).(2 marks)

a.An increase in spending by the government to build a new highway linking two main cities in Australia.(0.4 marks)

b.The priceof petroleum has increased in Australia due to the conflicts among the oil-producing countries. (0.4 marks)

c.An increase in technological knowledge in the Australian economy.(0.4 marks)

d.The housingmarket crisis in the USA made the global stock markets to collapse.(0.4 marks)

e.COVID19 had decreased the demand for Australian education services exports.(0.4 marks)