Hyacinth Macaw invests 46% of her funds in stock I and the balance in stock J. The standard deviation of returns on I is 10%, and on J it is 30%. (Use decimals, not percents, in your calculations.)   a. Calculate the variance of portfolio returns, assuming the correlation between the returns is 1. (Do not round intermediate calculations. Round your answer to 4 decimal places.)           b. Calculate the variance of portfolio returns, assuming the correlation is 0.6. (Do not round intermediate calculations. Round your answer to 4 decimal places.)           c. Calculate the variance of portfolio returns, assuming the correlation is 0. (Do not round intermediate calculations. Round your answer to 4 decimal places.)

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