can anybody help me with the last 2 it is not 2.73 neither 2.82. i tried 3.22 and 3.02 but none of them work i did this over and over and i really cant please help!

Check my world Consider the following information about three stocks: Rate of Return if State Occurs Stock B State of Economy Boom Normal Bust Probability of State of Economy 20 55 25 .50 Stock A 38 .16 .00 .14 -30 Stock C .50 12 --50 2:29 a-1. If your portfolio is invested 30 percent each in A and B and 40 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 3.60 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 3.20 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 lanswers as a percent rounded to 2 decimal places, e.g., 32.16.)