Question: X and Y are both positive or zero numbers. Each random variable has a mean of fifteen and a variance of five, with Corr(X, Y)

X and Y are both positive or zero numbers. Each random variable has a mean of fifteen and a variance of five, with Corr(X, Y) = 0.9.
1. Determine a constant c that makes X and X + cY separate.
2. What is the distribution of W = X + cY?

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