calculate the E(r) and standard deviation with details please!

TABLE 8.5 Returns of Zig, Peat, and 50-50 Portfolio of Zig and Peat State of Economy Probability of State Return of Peat Company 22% Retum of Zig Company 40% 12% Return of Portfolio 31.0% Boom 0.20 Steady 0.50 15% 13.5% - 4.5% Recession 0.30 5% Eln) 12.5% 10.7% 11.6%