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Assume you can invest in 2 stocks only, A and B. Short sales are allowed. Which if the following are feasible portfolios?xa=0.5, xb=0.5xa=1, xb=0xa=2.5, xb=-1.5xa=0.1, xb=0.9xa=1/3, xb=2/3xa=105/103, xb=-2/103xa=0, xb=1.5xa=-0.5, xb=2.5
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