4. (4 Marks) Champion Breweries must choose between two asset purchases. The annual rate of return and related probabilities given below summarize the firm's analysis. Asset A Rate of Return Asset B 10% Probability 30% Rate of Return Probability 5% 40% 15 20 40 15 20 40 30 25 For each asset, compute: (a) The expected rate of return. (b) The standard deviation of the expected return. (c) The coefficient of variation of the return. (d) Which asset should Champion select?