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Exercise 4: Using the lognormal distribution result of the price of a stock at time T show that: 0.95. Suppose the current price of a stock is s $40, and the annual expected return and standard deviation 0.10, 0.15. Find: a. b. c. A confidence interval for the price of the stock in 2 months. The expected price of the stock in 2 months. The standard deviation of the price of the stock in 2 months.