Critical Points

Please refer to these notes to graph the following:
1)  f(x)= 2x^3 +3x^2
2)  f(x)= x^2 + 5x + 4
3)  f(x)=(x + 4) (x - 2)^2
4)  f(x)=(x + 3)^2 (x - 1)^2

* (x+3)^2 means (x+3) is being SQUARED.