4. Let X and Y have joint pdf J2ee 0≤x≤ y ≤∞0 fxy(x, y): == {2 otherwise (a) Determine the best (mmse) estimator for X as a function of Y. (b) Determine the best linear estimator for X as a function of Y. (c) Plot both estimators (as a function of y) on the same graph and comment about the difference.
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