Myth-Speaker AP Question

If anyone has the Myth-Speaker AP and could answer the following questions I would greatly appreciate it.

1. Do the players become mythic in book 1 and if so what level does it happen at?
2. How does the book recommend picking the callings, does it just say the players should pick their callings or does it say the gm should pick, does it given advice as to what callings are fitting for the story or anything of the sort?
3. Are there any new callings in the book?

I am planning to turn my seven dooms game into mythic for the upcoming AP and want to see what the current mythic module reccomends on how to handle callings.