find variance in this case ?

Check my Problem 13-9 Returns and Variances (L01, 2) Consider the following information: State of Economy Boom Bust Probability of State of Economy 0.54 0.46 Rate of Return if State Occurs Stock A Stock B Stock C 0.12 0.20 0.38 0.15 0.06 -0.05 a. What is the expected return on an equally weighted portfolio of these three stocks? (Do not round intermediate calculations. Round the final answer to 2 decimal places.) Expected return 15.05 % b. What is the variance of a portfolio invested 15% each in A and B and 70% in C? (Do not round intermediate calculations. Round the final answer to 6 decimal places.) Variance