[blue62]

The water pump is in the center of the engine not the right hand side of the engine.
If you have coolant draining near the right rear wheel that is where the coolant tank overflow tube is.
There is no possible way for a failed water pump to cause coolant to leak into the trunk area.
You could possibly have multiple coolant system issues.

Failed pump...failed coolant tank....failed coolant hoses.

Do a proper pressure test of the system then you don't have to guess what or where the issue is.
If your taking it to a shop then they should do there own diagnosis.