Let the observations $x_i(1 \leq i \leq 10)$ satisfy the equations, $\sum_{\mathrm{i}=1}^{10}\left(\mathrm{x}_{\mathrm{i}}-5\right)=10$ and $\sum_{\mathrm{i}=1}^{10}\left(\mathrm{x}_{\mathrm{i}}-5\right)^2=40$. If $\mu$ and $\lambda$ are the mean and the variance of the observations, $\mathrm{x}_1-3, \mathrm{x}_2-3, \ldots, \mathrm{x}_{10}-3$, then the ordered pair $(\mu, \lambda)$ is equal to