{X₁, X2, ...,Xn} be independent and identically distributed random variables with common pdf f(x) depending on two parameters a and b, a, b>0, where the variance is ab². It is known the following estimated value â³6³-320, where â and are the maximum likelihood estimates of a and b, respectively, and the estimated information matrix of (â, ô) is (1000 15 200). The estimated variance of the maximum likelihood estimator of the variance is equal to k, using the delta method. Find â and (in terms of k).

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