Consider these data:

\[ X_1,\,X_2,\,...,\,X_n\overset{\text{iid}}{\sim}\text{N}(\theta,\,1). \]

  1. What is the maximum likelihood estimator of \(\theta\in\mathbb{R}\)?
  2. What is the sampling distribution of the estimator?
  3. What is the MSE of the estimator?
  4. Based on the MSE, what are the statistical properties of this estimator?