The primary key of the relation PROJECT$\_$TASK is a composite key consisting of the two attributes PROJECT$\_$NUMBER and TASK$\_$NUMBER. It has only one non$-$key attribute, START$\_$DATE, which is functionally dependent on the entire composite primary key. In what normal form is this relation and why?

$1$NF because there is a partial functional dependency.

$2$NF because there is a partial functional dependency.

$1$NF because there is a transitive dependency.

$2$NF because there is a transitive dependency.

none of the above.