What is the reflection of (5,−2)(5, -2)(5,−2) across the line y=xy = xy=x?
(−2,5)(-2, 5)(−2,5)
(2,−5)(2, -5)(2,−5)
(−5,2)(-5, 2)(−5,2)
(5,2)(5, 2)(5,2)