3. Consider the following information about the following portfolio invested 20% in stock A, 30% in stock B and 50% in stock C. Returns if State Occurs Stock Al Stock B Stock C State of Economy Boom Normal Recession Probability of State of Economy 10% 10% 5% 70% 15% 990 -149 692 20% 29 8% a. What is the portfolio expected return? Variance and standard deviation? b. The expected T-bill rate is 3.80 percent, what is the expected risk premium on the portfolio