Answer which form of the emh is most relevant for trading strategies in each part (weak, semi-strong, and strong). briefly explain why. (a) jane is a close friend of the ceo of hewlett-packard, and she trades stocks of hewlett-packard when she hears confidential news about the company from the friend (note that this is illegal in the us). (b) tom buys ibm stocks when yesterday’s return on coca-cola stocks is higher than the 3-month t-bill rate, and vice versa. (c) mike buys stocks at the nyse whenever each stock’s earnings announcement is better than he expects, and he sells them 90 days later.