Toddler sleepy time questions

Hello, ladies. I have 2 questions, but first let me say that my son is 31 months old. He takes 1 nap a day now. My 1st question is: How long should he nap? 2nd question: How many hours is he supposed to be sleeping at night? Thank you :)

    Brandy's list is awesome and very comprehensive. I know there is a great list on the Yaya Baby site as well (
    About Melissa
    Born: Center Line, Michigan
    Current: New Baltimore, Michigan
    Birth: March 16
    On since: Apr 28, 2014