each of the following functions with its graph. Do not use your calculator. Clicking on a graph will give you an enlarged view.

$f(x)=x\frac{(4-x{)}^2}{3}$

$f(x)=x^2-3$

$f(x)=-\frac{x^3}{3}+\frac{x^2}{4}+3x+\frac{1}{3}$

$f(x)=-\frac{x^4}{4}+\frac{x^2}{3}+1$