and 1. Firm X's common stock has an expected return of .15 and a standard deviation of 0.20. Firm Y's common stock has an expected return of 0.18 and a standard deviation of.24. The correlation coefficient between the two firms is .60. You have a portfolio that has $3000 invested in Firm X and $7500 in Firm Y. C. What was the general equation that resulted in the following specific equation: 286 = d. What was the general equation that resulted in the following specific equation: 171 = .714.18) + .286(.15) e. What was the general equation that resulted in the following specific equation: 228 = 286(.20) + .714.24) f. What would be the specific equation used to calculate the standard deviation of the portfolio? 3000 3000+7500