A quadratic function f is given. f(x) = x - 4x + 5 (a) Express fin standard form. f(x) = (x+2)-1 (b) Find the vertex and x- and y-intercepts of f. (If an answer does not exist, enter DNE.) vertex (x, y) = x-intercept (x, y) = y-intercept (x, y) = (c) Sketch a graph of f. -10 -9 -8 -7 -6 10- 9 8 7 6 5 4 Fill 3 2 Graph Layers After you add an obj can use Graph Layer properties.