Do I need to replace the water pump if it's leaking water

What is your question?

I just purchased a 2007 LINCOLN MKX. And was told that it's leaking water from the water pump. I drove it 15 miles and it didn't show a sign of leaking water, nor over heating. Could this be something simple? How do I know what the issue is? Do I need to replace the water pump? And is there a warranty I may can purchase to cover this issue?

What makes this problem better or worse?

Not sure, just purchased it

How long has your 2007 Lincoln MKX had this problem?

Unknown, just purchased it