Suppose C $=($fi$,$ f$2,0)$ is a first$-$order language, where fi$.$f$2$

are unary function symbols and o is a binary predicate symbol. Let $91=($N$,$ Ji

an C structure such that Ji $($n$)$:$=2$n and f$2\%($n$)$:$=$ n$\backslash$deg and g is $<=$ the usual order relation

$$ on N$)$

$($a$)$ Determine whether $207=(3$y$)/$i $($I$)=$ f$2(3),$where$2=3.$