Question 38 - 40 refer to following paragraph:

M: (38) Hello, I’m here because I’m interested in buying an instrument. My son just turned seven years old today and I thought it would be a great birthday present. Could you give me some advice on what to buy?
W: (39) Well, I usually suggest that children start by learning the piano. String instruments such as guitars or violins can be difficult for children to hold. On the other hand, a piano is fine for children as they can learn musical principles easily.
M: I see. However, do you think my son is too young to begin learning an instrument?
W: Not at all. Actually, children can learn as young as three years old. (40) Here is a pamphlet that will give you some information about the lessons for children that we offer.

38. Where most likely are the speakers?