pronunciation - How do I pronounce "s's" and "s'"?

Possible Duplicates:
What is the correct possessive for nouns ending in s?
Pronouncing possessive words that already end in s

How do I pronounce possessives that end with the awkward "s's" and "'s"? Examples:

I found the mistress's attitude ridiculous

These are the eggs' shells.

Which coat is Amos'?