1)What is Diane's response to his invitation on Thursday?
--She has to work that day, so she can`t go.
 2)How does Diane feel about Doug's idea for Friday?
--She feels that it would be uninteresting outing.

• I changed this answers.

1)She is happy.she can go.
2)She feels that it would be interesting outing.:)
I hope my answers are true:))