I'm having some trouble with the following problems...

Sketch the region bounded by the graphs of the functions and find the area of the region:

1) y=x^3 - 2x + 1, y=-2x, x=1

2) y=(e^(1/x))/(x^2), y=0, x=1, x=3

Write the definite integrals that represent the area of the region:

3) y=4/x, y=x, x=1, x=4

4) Find the area of the region enclosed by the graphs of f(x)=sinx and g(x)=cosx between x=pi/4 and x=5pi/4.

I have absolutely no idea what to do for these probs, so any help would be much appreciated. Thanks