show work for problems that need it on paper pleass

21. (0.2 point) 2 3 An aggressive security (a) has a large, positive beta. (b) will have a small covariance with market returns. (c) will have a small variance. (d) has a flat market line. (e) will have a low error term. 22. (0.2 point) From the market model, the unique risk is the (a) market risk. (b) unsystematic risk. (c) beta risk. (e) systematic risk. (d) market variance. 23. (0.2 point) Diversification will (a) not reduce a portfolio's total risk. (b) increase a firm's market risk. (c) increase a portfolio's total risk. (d) not reduce a portfolio's unsystematic risk. (e) reduce a portfolio's unique risk. 24. (0.5 point) Security A has a beta of 0.9 and a standard deviation of its error term of 88. standard deviation of the market is 10%, the total variance for Security A is (a) 17.2. 73.0. (c) 145.0. (d) 154.0. (e) 181.0. If the 25. (0.5 point) Security Y has a total variance of 225. Its beta is 1.2 and the market variance is 100. The standard deviation of its random error term is 6. (b) 141. (c) 35. (d) 98. (e) 111. 26. (0.3 point) A portfolio consists of Securities A, B, and C in the respective proportions of 0.3, 0.2, 0.5. If the securities' respective betas are 0.8, 1.4, 1.1, the beta for the portfolio is (a) 0.98. (b) 1.12. (c) 1.07. (d) 1.23. (e) 1.20. 27. (0.5 point) A portfolio consists of Securities A and B in the proportions of 0.7 and 0.3. Security A has a random error standard deviation of 7%; Security Bat 11%. The portfolio beta is 1.2, and the market standard deviation is 10%. The total portfolio variance is (a) 158. (b) 204. (c) 265. (d) 179. (e) 137. 28. (0.2 point) When using the market model for portfolio development, the analyst assumes that the correlation between each security's random error is 0.5. (b) 0.0. (c) -0.5. (d) -1.0. 1.0