Broken Teeth

Yesterday I rode with Sam on the trail near our house. I was frustrated out of the gate because the chain would jump off of the front middle chain ring. Grrrrrrr... I rode anyway, and made a couple of stops to try and "fix it," thinking it was more of an adjustment issue. This morning I tossed it up on the work stand and realized it was more than just an adjustment issue, and more than just a build up of grease that would prevent the chain from setting correctly. Broken teeth. One tooth was completely missing, and three others were broken/worn at the tip. It is understandable. It is the chain ring that gets used the most. And, it had seen a lot of very good days.

Can you find the missing tooth?