Determine the Vertex of the Graph of the Parabola $y = 3 x ^ { 2 } - 24 x + 50$

Determine the vertex of the graph of the parabola.
- $y = 3 x ^ { 2 } - 24 x + 50$

A) (-4, 2)
B) (2, -4)
C) (2, 4)
D) (4, 2)