Question B3 (a) Explain with TWO reasons how stock market can be efficient even individual investors are irrational (4 marks) (b) Orange Daily, a renowned newspaper with the highest readership in Country Y, reported that new government policy will be launched to provide subsidy to renewable energy sector such as companies engaged in producing wind and solar energy. One week later, government announced the subsidy policy to renewable energy sector as reported. Describe and explain how the stock prices of wind and solar energy companies change when (1) the policy is reported by Orange Daily and (2) the policy is announced by government respectively under semi-strong-form efficient market. (6 marks)