Consider triangle A B C with vertices at A ( 2 , 4 ) , B ( 4 , − 1 ) , and C ( 3 , 3 ) . What are the vertices of triangle A ′ B ′ C ′ , which is the image of triangle A B C after a reflection across the y -axis followed by a translation 3 units to the right? A ′ ( − 2 , 4 ) , B ′ ( − 4 , − 1 ) , C ′ ( − 3 , 3 )