Swift manufacturing is evaluating an asset purchase. The annual rate of return and the related probabilities given in the following table summarize the firm's analysis to this point. a: compute the range of possible rates of return b: compute the expected return c: compute the standard deviation of the returns d: compute the coefficient of variation of the returns Table rate of return probability 5% 0.05 10% 0.10 15% 0.05 20% 0.10 25% 0.30 30% 0.10 35% 0.10 40% 0.10 45% 0.10