I'm on a time identify the reflection of the figure with vertices a(7,8), b(−12,19), and c(14,−21) across the line y=x. a (8, 7), b (19, −12), c (−21, 14) a (8, 7), b (12, −19), c (14, −21) a (8, 7), b (−19, 12), c (14, −21) a (7, 8), b (19, −12), c (21, −14)