Four (long?) vertex problems

Here are some vertex problems that I don't understant, if anyone does please teach me

1. V lies in the first quadrant of the graph and makes an angle pi/3 with the positive x-axis. And |v| = 4. Find V in component form

2.A clothesline tied between 2 poles 8m apart. When a wet shirt with a mass of 0.8kg is hung at the middle the midpoint is pulled down 8cm. Find the tension in each half of the clothesline.

3. A woman walks west on the deck of a ship at 3miles/hr. The ship is moving North at 22mi/hr. Find the speed and direction of the woman relative to the surface of water.

4. F1 and F2 with magnitude 10lb and 12lb act on an object at point P. Find the resulant force F acting at point P with the magnitude and direction.

For #4:

http://img97.imageshack.us/img97/9467/image17al.jpg

(The X is including F2's 30 degrees)