$U=\{1,2\},Y=\{a,b\},x=\{1,2,3\}$

$($a$)$ Is $$ Observable?

$($b$)$ What about fixed input observability? That is$,$ does E input function $($here a sequence$)$ that distinguishes between any pair of states?

$U=\{1,2\},Y=\{a,b\},x=\{1,2,3\}$

$($a$)$ Is $$ Observable?

$($b$)$ What about fixed input observability? That is$,$ does E input function $($here a sequence$)$ that distinguishes between any pair of states?