After executing the command below, how can we determine the process listening on port $5678?$

$\backslash$table$[[$tcp$,0,0127\mathrm{.}0\mathrm{.}0\mathrm{.}1$:$631,0\mathrm{.}0\mathrm{.}0\mathrm{.}0$:$***,$LISTEN$],[$tcp$,0,00\mathrm{.}0\mathrm{.}0\mathrm{.}0$:$5678,0\mathrm{.}0\mathrm{.}0\mathrm{.}0$:$**,$LISTEN$],[$tcp$,0,0127*0\mathrm{.}0\mathrm{.}53$:$53,0\mathrm{.}0\mathrm{.}0\mathrm{.}0$:$**,$LISTEN$],[$tcp$6,0,0$:::$5678,$:::${?}^{***},$LISTEN$],[$tcp$6,0,0$:::$21,$:::${?}^{**},$LISTEN$],[tcp6,0,0$:::$80,$:::${?}^{***},$LISTEN$],[$cp$6,0,0$::$1$:$631,$::${?}^{***},$LISTEN$]]$

a$.$ Executing, as root, the command netstat $/$port $5678$

b$.$ Executing, as root, the command lsof $-i$:$5678$

c$.$ Executing, as root, the command netstat $-$p $5678$

d$.$ Executing ps aux I grep $5678$