Consider the following covariances between securities:     Duke Microsoft Wal-Mart Duke 0.0568 -0.0193 0.0037 Microsoft -0.0193 0.2420 0.1277 Wal-Mart 0.0037 0.1277 0.1413 What is the variance on a portfolio that is made up of $6000 investments in Microsoft and a $4000 investment in Wal-Mart stock?

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