Need advice to repair hole in hull at front of centerboard trunk

Friend gave me a sunfish, said it leaked a bit. Took it out yesterday and noticed water draining from the bottom when the boat was back on the boat lift. Inspection revealed the hull was half full of water. Inspecting it I see a hull gap right in front of the centerboard and about a 1/4 inch hole clean through. Looks like the patch from an earlier repair came out. This is just a fun boat so a perfectly faired hull repair is not needed however I have not done any fiberglass work and...

Need advice to repair hole in hull at front of centerboard trunk