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Question 4 a) Consider the following cash flow diagram. What is the value of X if the rate of return is 15%? $400 (3 marks) b) Consider the following "present worth versus interest rate" graph for a well behaved investment. If the interest rate at B is 20%, then which of the following best describes the analysis or the investment ii, iii, iv. the IRR of the investment is less than 20% the IRR of the investment is equal to 20% the IRR ofthe investment is greater than 20% none of the above are true