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2. Suppose Yl is a random variable with variance 01 9, Y2 is a random variable with variance 02 Y3 is a random variable

2. Suppose Yl is a random variable with variance 01 9, Y2 is a random variable with variance 02 Y3 is a random variable with variance 25. Suppose further that Cov(Y1, Y2) = 4, Cov(Y1, Y3) Cov(Y2, Y3) = 7. Find V(2Y1 - 3Y2 +4%). Ans. 460 16, and 6, and

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