Need help on re-attaching front bumper right side only

Silly, silly boy...while parking my car, he pulled too far ahead and the bumper went over the curb. While reversing it back out, it pulled the right side of the bumper off. Now it is hanging (not really bad!) but enough that there is a small gap between bumper and the rest of the body. Heard this was a pretty quick fix, as only the screws got pulled out. Can someone let me know how to re-attach without having to take to the shop and pay hundreds for something easy??? Thanks!

well then find the screw and screw it in to the thread hole!
if it's hanging you may have to support the bumper a bit while you screw it in.