Suppose that the index model for stocks A and B is estimated from excess returns with the following results: RA = 2.0%+0.40RM + eA = -1.8% + 0.90RM + eB OM = 15%; R-square = 0.30; R-squareB = 0.22 RB Assume you create a portfolio Q, with investment proportions of 0.50 in a risky portfolio P, 0.20 in the market index, and 0.30 in T-bill. Portfolio P is composed of 70% Stock A and 30% Stock B.

a. What is the standard deviation of portfolio Q? (calculate using numbers in decimal form, not percentages. Do not round intermediate calculations. Round your answer to 2 decimal places.)

b. What is the beta for portfolio Q? (Round your answer to 2 decimal places.)

c. What is the "firm-specific" risk of portfolio Q? (calculate using numbers in decimal form, not percentages. Do not round intermediate calculations. Round your answer to 4 decimal places.)

d. What is the covariance between the portfolio and the market index? (calculate using numbers in decimal form, not percentages. Do not round intermediate calculations. Round your answer to 2 decimal places.)

Suppose that the index model for stocks A and B is estimated from excess returns with the following results: RA=2.0%+0.46RM+eARB=1.8%+.90RM+eBM=15%;R-squareA=.30;R-squareB=0.22 Assume you create a portfolio Q, with investment proportions of 0.50 in a risky portfolio P,0.20 in the market index, and 0.30 in T-bill. Portfolio P is composed of 70% Stock A and 30% Stock B