The graph of function f is shown below. A graph is a downward open parabola with its vertex at (negative 2, 7) and passes through the points (negative 5, negative 2), and (1, negative 2). If g(x) = 4(x - 2)2 - 4, complete the following statements. The axis of symmetry of function f is x = . The axis of symmetry of function g is x =