Given the following relation and functional dependencies:

COORDINATES $($UnitCode$,$ Semester, Option, Coordinator$)$

FD: UnitCode, Semester, Option $->$ Coordinator

$$ What is $($are$)$ the candidate key$($s$)?$

$$ Which NF is the relation in$?$

$$ Convert the relation into a relation or set of relations in at least $3$NF