A quadratic function y, equals, f, left bracket, x, right brackety=f(x) is plotted on a graph and the vertex of the resulting parabola is left bracket, 6, comma, minus, 4, right bracket(6,−4). What is the vertex of the function defined as g, left bracket, x, right bracket, equals, f, left bracket, x, right bracket, minus, 2g(x)=f(x)−2?