$2-28$ IIII Determine whether the series is absolutely convergent,

conditionally convergent, or divergent.

$\backslash$sum$\_($n$=1)^(\backslash$infty $)($n$^(2))/(2^($n$))$

$\backslash$sum$\_($n$=1)^(\backslash$infty $)(1)/((2$n$)!)$

$\backslash$sum$\_($n$=1)^(\backslash$infty $)$ e$^(-$n$)$n$!$

$\backslash$sum$\_($n$=1)^(\backslash$infty $)((-1)^($n$)$e$^((1)/($n$)))/($n$^(3))$

$\backslash$sum$\_($m$=1)^(\backslash$infty $)($sin$4$n$)/(4^($n$))$

$11$ and $12$ please