please solve it

Consider the following information about three stocks: a-1. If your portfolio is invested 40% each in A and B and 20% in C, what is the portfolio expected return? (Do not round intermediate calculations. Enter the answer as a percent rounded to 2 decimal places.) Portfolio expected return a-2. What is the variance? (Do not round intermediate calculations. Round the final answer to 8 decimal places.) Variance a-3. What is the standard deviation? (Do not round intermediate calculations. Enter the answer as a percent rounded to 2 decimal places.) Standard deviation b. If the expected T-bill rate is 4.80%, what is the expected risk premium on the portfolio? (Do not round intermediate