please help me

Consider the following information about three stocks: Rate of Return ir State Occurs State of Economy Boom Normal Bust Probability of State of Economy .26 .50 24 Stock A .26 21 .05 Stock B 38 19 - 38 Stock C 55 17 - 46 a-1. If your portfolio is invested 35 percent each in A and B and 30 percent in C, what is the portfolio expected return? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) a-2. What is the variance? (Do not round intermediate calculations and round your answer to 5 decimal places, e.g., 16161.) a-3. What is the standard deviation? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. If the expected T-bill rate is 4.10 percent, what is the expected risk premium on the portfolio? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) c-1. If the expected inflation rate is 3.70 percent, what are the approximate and exact expected real returns on the portfolio? (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g. 32.16.) c-2. What are the approximate and exact expected real risk premiums on the portfolio? (Do not round Intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.)