Consider the following information: Rate of Return if State Occurs State of Economy Boom Bust Probability of State of Economy 0.72 0.28 Stock A 0.09 0.11 Stock B Stock C 0.17 0.05 0.07 0.15 a. What is the expected return on an equally weighted portfolio of these three stocks? b. What is the variance of a portfolio invested 30 percent each in A and B and 40 percent in C