6. (Wild cats) Suppose there are n assets which are uncorrelated. (They might be n different "wild cat" oil well prospects.) You may invest in any one, or in any combination of them. The mean rate of return ~ is the same for each asset, but the variances are different. The return on asset i has a variance of of for i = 1, 2. . ..,n. (a) Show the situation on an f-o diagram. Describe the efficient set. (b) Find the minimum-variance point. Express your result in terms of -1