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01 A Mathematics Investment analyst receives the following data showing the percentage changes in Labor costs of Junior managers in an investment bank Chain over a 12-months period. The highest change observed was +172 per cent for a senior manager in one of the banks in Madrid. Percentage Change Frequency -5 to under 0 2 O to under 5 32 5 to under 10 25 10 to under 15 10 15 to under 20 8 20 to under 253 25 to under 30 2 30 to under 355 35 to under 404 40 to under 100 3 100 to 1724 a). What is the mean annual percentage change in Labor costs for Junior managers in this investment bank? b). What is the estimate of the Median Value? c). What is the modal Class interval? Q2 The following information applies to a portfolio composed of Fund A and Fund B. Fund A Fund B 70 30 10 16 7 13 0.80 Portfolio weights (%) Expected returns (%) Standard deviations (%) Correlation between the returns of Fund A and Fund B The portfolio's standard deviation of return is closest to: A. 7.38%. B. 8.80%. C. 8.35%