Determine whether each of the following sets is unifiable. If yes, obtain a most general unifier.

i$.$ W $=\{$T$($u$,$ v$,$ w$),$ T$($x$,$ x$,$ g$($x$,$ y$))\}$

W $=\{$Knows$($Father $($y$),$ y$),$ Knows$($z$,$ Father$($z$))\}$