do 7,8 please

Question 7 A portfolio consists of Securities A, B, and in the respective proportions of 0.3, 0.2.0.5. If the securities' respective betas are 0.8, 1.4, 1.8, the beta for the portfolio is 1. Show the formula 10.1 point) 2. Show Steps and calculation 10.2 point) 3. Present the answer 0.1 point) Upload Choose a Fle Question 8 0.7 pts A portfolio consists of securities And Bin proportions of 07 and 03 Security A has a random error standard deviation of Security Bat 11%. The portfolio beta is 1.2 and the market standard deviation is 15%. The total portfolio variance is 1. Show the formula 10.1 point 2. Show Steps and calculation 10.5 point) 3. Present the answer 0.1 point) Choose a Fle