Ineed to know the answers to all, if only one that’s fine too

In the given question, it is given that AB and DC are parallel and congruent.

So the reason for the first two statements are " Given" .

Third statement is angle BAC and DCA are congruent. And from the diagram, we can say that these angles are alternate interior angles. And alternate interior angles are congruent . So the reason is alternate interior angles postulate .

Fourth statement is AC and AC are congruent, and the reason is reflexive property .

And the final statement is triangles ABC and DCA are congruent, and the reason is SAS postulate .

ummm seems that u didnt post the attachement !