(08.02 MC) The functiоn f(t) = 4t2 − 8t + 6 shоws the height frоm the ground f(t), in meters, of а roller coаster cаr at different times t. Write f(t) in the vertex form a(x − h)2 + k, where a, h, and k are integers, and interpret the vertex of f(t).