Let $l()=lnL(x_1,$dots,$x_n,)$ denote the $log$ likelihood. Find the critical point $ofl(){\stackrel{}{x}}_n$ and $\frac{?}{\text{b}\text{a}\text{r}}(x_{-}{n}^2)$ for $\frac{?}{\text{b}\text{a}\text{r}}(x_n^2).l()isat=$

Find the second derivative $l^{\text{'}\text{'}}=\frac{d^{2}l}{d{}^2}ofl().$ Your answer should $be$ a function $of$ and the data

$x_1,$dots,$x_n{l}^{\text{'}\text{'}}at$ the critical point $at$ this stage.${\displaystyle \underset{i-1}{\overset{n}{}}}{x}_i$ and and $Sigm{a}_i(X_i^2)$ for ${\displaystyle \underset{i-1}{\overset{n}{}}}{x}_i^2.l^{\text{'}\text{'}}=\frac{d^{2}l}{d{}^2}=$