Does closed imply bounded?
The set $\{\,(x,y)\in\mathbb R^2\mid xy=1\,\}$ is closed but not bounded.
Even simpler, $\mathbb R^n$ itself is closed (but not bounded).
$\mathbb{R}^m$ itself is a closed set. is it bounded?
But in case of Compact sets, they are closed as well as bounded in $\mathbb{R}^n$.