Swift Manufacturing is evaluating an asset purchase. The annual rate of return and the related probabilities given in the following table summarizes the firm's analysis to this point:

Rate of Return	Probability
15%	0.1
25%	0.1
35%	0.05
45%	0.1
55%	0.25
65%	0.15
75%	0.1
85%	0.1
95%	0.05

.

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.