Bonjour Kay,

- 'Finalement' isn't always an equivalent of the English word 'finally' - a bit of a faux-ami, I would say.

In a situation where you had to wait a long time for a friend to arrive / a piece of information (for example), you are going to use: Enfin ! (= Finally!) - which is the situation in this exercise.

This is a link to a previous answer on Finalement vs Enfin which includes another link to a video on this particular topic.

I hope this is helpful.

Bonne journée !