Broke my water pump bolt. Now what? (Update - broken bolt is out)

Hafta look again above to see which one has the broken stub.... As to whether it's one of the ones that goes thru and the back side can be seen, or whether it's one of the "blind" holes, that somewhat dictates what can be done to extract the stub.
Ok, looks like it's one of the blind holes .... that changes things a bit, as to what can be done to extract it.... and for whoever said heli coil to the next step bigger, no.
The idea of a heli coil is to be able to restore it to the same size as original. We've all drilled oversized and directly tapped a hole bigger, without a heli coil.
Hopefully he can go with something the same size as original, if he has to go bigger he'll have to also ream out the water pump hole to match.
And the same with any accessory bracketry that might go there ... AC brackets maybe?
Those water pumps are aluminum. Being where it broke at I'm guessing corrosion from dissimilar metals. With the water pump out of the picture it may well thread right out.