Problem 3 Stocks X, Y, Z are currently traded at Px = $10, Py = $20, and P2 = $30. Their standard deviations of the returns are ox 8%, dy = 20%, and oz 14%. The return correlations between: [1] X and Y is 0.6. [2] X and Z is -0.2, and [3] Y and Z is 0.5. 1 a. (1pt) What is the standard deviation of the returns of the equal weighted portfolio of Stock X and Y? b. Cipt] What is the standard deviation of the returns of the price weighted portfolio of Stock X and Z