Which of these sentences is correctly punctuated you are old grandpa William said the young man

Question

anonymous · Answer

Please post the full question.

anonymous · Answer

By "sentences," I assumed you meant "words," so it that spirit, the answer is:
             "You are old, grandpa William," said the young man. 
See, the young man is the one saying it, and the parentheses and comma clarify what the sentence is saying.

anonymous · Answer

Actually, the grandpa's name should be "Grandpa William," because this is his title, so both should be capitalized. :)