Let $L=\{f,g,R,S,c,d\}$ where $f$ is a unary function symbol, $g$ is a binary function symbol, $R$ is a binary relation symbol, $S$ is a ternary relation symbol, and $c$ and $d$ are constants.

$($a$)$ List all subformulas of $)=(g(x_1,x_2).($Here$,$ you do NOT need to show how you got your list, just give the subformulas.$)$

$($b$)$ Use the definition of a subformula to compute sub$()$ where

$=$notAAx$(R(x,y)S(x,y,z)).$

You must show your work and do not skip steps.