also need the standard deviation

Question 23-25 are based on the following information Consider the following information on a portfolio of three stocks: 1 pts State of Economy Probability of State of Economy 15 Boom Normal Bust Stock A Rate of Return Stock B Rate of Return 60 02 Stock Rate of Return 25 10 if your portfolio is invested 30 percent each in A and B and 40 percent in C, what is the portfolio's expected return? (please put your answer in %, for example, 10 not 0.10) 16 32 12 - 11 .60 20 35 Question 24