please help me with c-2!!

.44 ed .24 Rate of Return if State Occurs Probability of State State of Economy of Economy Stock A Stock B Stock C Boom .25 .32 .60 Normal .40 .22 .20 Bust .35 .02 -24 -40 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 4.40 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 4.00 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.) 12.51 % a-1. Portfolio expected return a-2. Variance a-3. Standard deviation b. Expected risk premium C-1. Approximate expected real return C-1. Exact expected real return c-2. Approximate expected real risk premium C-2. Exact expected real risk premium 0.07599 27.57 % 8.11% 8.51 % 8.18 % 0.40 X % 0.39