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Problem 4: Two continuous random variables X and Y have a joint PDF given by: fXY(x,y)={Axy,0,
when0x2,0y2else (a) Find the value of the parameter A. (b) Find P(XY1). (c) Find E[XY]. (d) Find
the PDF of X and the PDF of Y. (e) Find E[X] and E[Y]. Are the two variables uncorrelated?

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