3. Assume that we have I independent random samples. For i = 1,. , I, we assume that the ith random sample (Yi1, Yi2,...,YiJ) came from the normal distribution with with mean ; and variance o. These assumptions can be summarized using the following statistical model: where ij Yij = pi+ Eij i = 1, I = " 1, J id N(0, 2). Show that the MLE of is f = = }} Yij.