i need problem in php for partition of set into 2 equal subsets with minimum sum ofdifference

PROBLEM #1: 20 kids have gotten together to play baseball, but they need help making the teams as even as possible. The kids have all ranked their skill level from 1- 10. In no particular order, here are their skill numbers: 8,5,6,9,3,8,2,4,6,10,8,5,6,1,7,10,5,3,7,6. Write an algorithm (in PHP) that will place these (or any other) kids into two teams of equal size with the total skill level being as even as possible. Using PHP's GD Image primatives (squares, circles, lines) draw any image you'd like