4. Given the following information for returns K, and Kz: Scenario Probability Recession 0.3 Stagnation 0.3 Boom 0.4 Return K -10% 0% 15% Return K2 -5% 5% 10% a. Please find the weight of the portfolio with the minimum variance among all feasible portfolios. b. What is the expected retum and variance of this portfolio