please show calculations Assessment question 4 A stock had returns of 14 percent, 13 percent, -10 percent, and 7 percent for the past four years.

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please show calculations

Assessment question 4 A stock had returns of 14 percent, 13 percent, -10 percent, and 7 percent for the past four years. Please calculate the mean value and the standard deviation of the historical retums. Assessment question 5 What is the variance of the returns on a portfolio that is invested 60 percent in stock Sand 40 percent in stock T? CE Return if state occurs cool van State of Probability of 19 state of economy state Boom 30% Normal 70% Economy Stocks 17% -3% Stock T 7% 10%