2. (18 points) Let X,..., X be a random sample from a distribution with density function f(x|0) = 2x/0, and zero, otherwise. We know that T an unbiased estimator of 0. = 0 < x < 0, (n) is a biased estimator of 0. Find c such that c is 3. (10 points) Let X1,..., X be a random sample from a distribution with density function n (x|, ) = e(x)/, < x < +, 0