Dug: My master made me this collar. He is a good and smart master and he made me this collar so that I can talk. Squirrel!.My master is good and smart.
Carl: It's not possible!
Dug: It is, because my master is smart.
Carl: Russell, if you don't get up, the tigers will eat you.
Russell: There aren't any tigers in South America. Zoology.
Beta: Treats. I smell treats. I like treats.
Dug: My name is Dug. I have just met you and I love you.
Answer: According to writer/director Pete Docter, Carl was 9 and Muntz was 23, so if Carl is 78 in the rest of the film, that would make Muntz about 92.
Sierra1