Comment 5 for bug 500503

I've edited an image i found: http://icons.mysitemyway.com/wp-content/gallery/simple-black-square-icons-people-things/127410-simple-black-square-icon-people-things-hat-graduation.png
out of this one i made the attached SVG.
it would be nice if someone will make it better, since i made it with a program, and can't find out how to make it "cleaner".