a little in front of you–over your forehead, not over the crown of your head. you should be able to see your arms above you by raising your eyes, and without raising your head.
third position: third position is when one arm is in fifth position, and the other arm is in second position.
fourth position: fourth position is when one arm is in fifth position, and the other arm is in first position. this position is not used very often, honestly. a more common fourth position used quite frequently is one arm in second, the other in first. sometimes this is called third or low third, depending on the teacher. if 