Determine roots in the increasing order. f(x)=(x-3)(x-4)(x-8). To left of first root, is the graph of the f(x) above or below x-axis? Between first two roots, is the graph of f(x) above or below x-axis? Between second and third roots, is the graph of f(x) above or below x-axis? After last root, it eh graph of f(x ) above or below x-axis?