How long is the man’s presentation supposed to last?

W：Hi, John. You are supposed to make a speech this afternoon, right? Are you ready for that?
M：Yes，I’ve got two hours for my presentation, but there’s a problem. I set up the overhead projector and prepared everything, but the room is not very spacious. There will be 30 people, but only 25 people can be seated.
W：Why don’t you call Janet and see if she can find another room for you?
Number 38.How long is the man’s presentation supposed to last?
Number 39.What problem does the man need to solve?
Number 40.What does the woman suggest?